Skip to main content
Book Exam
Map
Menu
green-line

370 Shelburne RoadBurlington, VT 05401

LUKE-AWTRY-PHOTOGRAPY-Chroma-Optics-07112017-042-min
Home »

Year: 2016

Holiday Season Shopping: Are Nerf Guns Safe for the Eyes?

mom 20and 20dad 20with 20child 20in 20pink

Nerf guns or blasters come in a remarkable number of shapes and sizes and have become incredibly popular for use in the home and even in large scale “Nerf Wars”. However publicity surrounding the toy has not been all positive. Many parents out there are questioning the safety of the toy foam guns, particularly to the eyes, before making the purchase.

The question of safety ultimately comes down to the user. Nerf darts are relatively soft, foamy and not inherently dangerous, but if shot in the wrong way, they could cause pain or even serious injury. This is particularly true of the eyes because they are a vulnerable organ that can be damaged easily upon impact. Injuries from even a soft projectile could include corneal abrasions (surface scratches), bleeding, cataracts and even retinal detachment which can lead to permanent vision loss.

Nevertheless, Nerf guns are fun and can even be used to help motor development and other skills, so with the right guidelines, children can learn to use them safely and benefit from the enjoyment they provide.

Want surefire eye safety? Wear safety glasses

The best defense for your eyes is safety glasses. This is the one way you can be sure that you or your child’s eyes are truly safe during Nerf shooting. We strongly recommend safety glasses be worn during any play that involves projectile objects, particularly for small children or during serious games such as Nerf Wars.

General rules of Nerf Gun play:

  1. Never shoot at the face.
  2. Never look into the barrel of the nerf gun, even if you think it isn’t loaded.
  3. Avoid walking around with your finger on the trigger until you are ready to point and aim at the proper target.
  4. Only shoot others that are “playing” and are aware that you are aiming at them.
  5. Don’t shoot from a moving vehicle (including a bicycle, skateboard, rollerblades, etc.).
  6. Don’t shoot at a moving vehicle.
  7. Never shoot at a close range.
  8. Never leave loaded gun in reach of a child or individual that is not able to use the toy properly and safely.

To be safe, all toy guns that shoot projectiles should be treated as a dangerous toy in order to ensure proper usage and precautions. Yes, Nerf guns can cause serious eye damage and even vision loss, but these type of injuries can be caused by many “harmless” objects as well. Before you purchase a toy like this for your child, ask yourself whether the child is old enough and mature enough to understand the safety issues involved and to be able to use it responsibly.

Dry Eye Syndrome Causes and Cures

cactus2

Why Are My Eyes So Dry?

Do you experience dry, scratchy, burning eyes, redness or pain, a gritty feeling like something is in your eye? Or perhaps, excessive tearing, blurred vision, eye fatigue or discomfort wearing contact lenses? There could be a number of causes for your symptoms including allergies, reactions to an irritant or medication or an infection. You could also have a chronic condition called Dry Eye Syndrome.

It’s estimated that one out of every eight adults suffers to some extent from dry eye syndrome, which can range from mild to severe. Despite the fact that it is one of the most common eye problems, a surprisingly large percentage of patients are not aware of it.

What is Dry Eye Syndrome?

Your eyes need a layer of tears to lubricate the surface and keep the eyes comfortable, clean and clear. These tears also wash away particles, dust and bacteria that can lead to infection and eye damage. Dry eye syndrome occurs when there is a chronic lack of lubrication on the surface of the eye either because not enough tears are being produced, the quality of the tears is weak or they evaporate too quickly. This causes the common uncomfortable symptoms including:

  • Itching
  • Burning
  • Redness
  • Soreness or pain
  • Dryness (and sometimes even excessive tearing because the eyes are trying to compensate)
  • Light sensitivity
  • Eye fatigue
  • Blurred vision
  • Grittiness or a feeling like there is something in your eye
  • Vision seems to change when blinking

Factors that Contribute to Dry Eye Syndrome

There are a number of factors that can increase your risk of suffering from Dry Eye Syndrome. While some of them are inherent, there are some environmental factors that can be changed to reduce your risk or symptoms. Risk factors include:

  • Aging: While it can occur at any age, dry eye is more common in individuals over age 50.
  • Women: Likely related to hormonal fluctuations, women are more likely to develop dry eyes than men, especially during pregnancy, menopause or when using birth control pills.
  • Digital screen use: Whether it is a computer, a smartphone or a tablet, when our eyes are focused on a digital screen we tend to blink less, increasing tear evaporation and increasing dryness, blurriness and discomfort. Remember to regularly take a break, look away from the screen and blink several times.
  • Medications: A number of medications – both prescription and nonprescription – have been found to cause dry eye symptoms including certain blood pressure regulators, antihistamines, nasal decongestants, tranquilizers and antidepressants.
  • Contact lenses: Dry eyes is a common problem in contact lens wear. Several manufacturers have started offering lenses that hold more moisture to combat this common issue.
  • Dry air: Whether it is the air conditioning or forced-air heating inside or the dry, windy climate outside, the environment of the air around you can contribute to dry eyes by causing your tears to evaporate too quickly.
  • LASIK: One side effect of LASIK and other corneal refractive surgery is dry eyes, which usually lasts about 3-6 months and eventually resolves itself.
  • Eyelid conditions: Certain conditions which prevent the eyelid from closing completely when sleeping or even blinking can cause the eye to try out.
  • Allergies or infections: Chronic inflammation of the conjunctiva which is often caused by allergies or infections such as Blepharitis can result in dry eyes.
  • Systemic diseases: People with autoimmune diseases or systemic conditions such as diabetes, thyroid disease, Sjogren’s syndrome, rheumatoid arthritis and lupus are also more prone to Dry Eye.

How do you treat dry eye symptoms?

If you have dry eyes, you don’t need to suffer. There are a number of treatment options that can help, depending on the severity and cause of your condition, which can reduce symptoms and enhance your comfort.

Treatments for dry eyes can include non-prescription or prescription eye drops, omega 3 supplements, special lid therapies, punctal plugs, ointments, different contact lenses, goggles or ergonomic changes to your work station. Speak to your eye doctor to discuss the cause of your dry eye and the best remedy for you. Even when it comes to the seemingly straightforward treatments like over-the-counter eye drops, they aren’t all the same. Different ingredients are tailored towards different causes of dry eye.

Get Help for Dry Eyes Today

If you are experiencing the symptoms above, schedule an appointment with your eye doctor to find out the best solution for you.

November is Diabetes Awareness Month

father 20waving 20with 20child

Diabetes is a growing health crisis in North America as an estimated 29 million Americans and 3.4 million Canadians are currently living with the disease. Chances are it affects you or someone you know. November has been dedicated as a time to spread awareness about the disease, its risk factors and the effects it has on your body, your daily life and the lives of your loved ones.

Diabetes and Your Eyes

Diabetes is a systemic disease that causes fluctuations in glucose (blood sugar) levels which can affect blood vessels throughout the body including those in your eyes and visual system. People with diabetes are at higher risk for blindness than the general population, however with regular eye exams and proper care, most of the complications are minor and treatable.

Minor changes in glucose levels could result in complications such as blurred or double vision, floaters or even visual field loss. These conditions are usually quite treatable. Diabetics are also at greater risk for developing eye diseases such as glaucoma (40% increase risk) and cataracts (60% increased risk). With early detection, both of these conditions can be treated and the majority of vision restored.

Diabetic eye disease often has NO noticeable symptoms or pain, so comprehensive eye exams that include dilating the pupils are essential to detect signs of diabetes. Online vision assessments will not detect diabetic eye disease.

The condition that is the most concerning risk of diabetes is called diabetic retinopathy which can lead to blindness if not diagnosed and treated.

What You Need to Know About Diabetic Retinopathy

Diabetic retinopathy occurs when the tiny blood vessels or capillaries in the back of the eye develop weakened vessel walls. If not treated, the vessels leak fluid and become blocked. This can progress to hemorrhages in the retina, and over time the eye does not receive enough oxygen and nutrients. As a result, new fine blood vessels start to grow. These proliferating vessels leak and can cause further bleeding, scarring and potentially lead to blindness. A special zone in the central retina called the macula is especially susceptible to diabetes. Diabetic macular edema (when fluid seeps into the macula) can cause permanent vision loss if not promptly detected.

There are treatments for stopping the progression of the disease such as laser therapy or intraocular injections, although once damage to vision has occurred, it is often permanent. This is why the condition must be diagnosed and treated early on.

All diabetics should have a regular comprehensive eye exam to catch any early signs of diabetic retinopathy or other vision threatening conditions. Because risk factors vary, speak to your eye doctor about how often you should have an exam. Risk factors for diabetic retinopathy include:

  • Length of time living with diabetes
  • Uncontrolled blood sugar levels
  • High blood pressure
  • Smoking
  • Alcohol consumption
  • Pregnancy
  • Genetics

Although blindness from diabetes is preventable it is still a leading cause of blindness among working-age adults. If you or someone you know has the disease, make sure that proper eye care is a priority.

Don’t Let Fall Eye Allergies Get You Down

jamie in the fall

Red, itchy, watery eyes and swollen eyelids (along with sneezing, congestion or a runny nose)… these symptoms are a clear indication that allergy season has arrived. These allergic symptoms are caused by a reaction to allergens, which are substances in the environment that are usually harmless. If, however, you are one of the unlucky that is predisposed to allergies, these substances can illicit a serious and sometimes even debilitating allergic response. 

As opposed to food, medicine, or insect allergies which don’t often affect the eyes, eye allergies are a common symptom of airborne allergens including mold, pollen (from trees and flowers), dust and pet dander. The summer fall and spring are often the worst times for a high pollen count and many individuals suffer during these seasons. 

An allergic eye reaction occurs when your eye releases histamines in an effort to protect itself from a perceived threat (an allergen such as dust, pollen, animal dander, mold spores, eye drops or airborne chemicals). The release of the histamines causes the symptoms of redness, itchiness, burning and tearing. This response is also sometimes known as allergic conjunctivitis. 

The most common type of eye allergies are perennial and seasonal allergic conjunctivitis. Perennial eye allergies are a response to household allergens that exist all year round such as pet dander, mold, or dust mites. Seasonal allergies usually result from pollen from plants, grass and trees that are found in the air and depend on the season and the types of pollens in the environment.  Seasonal allergic conjunctivitis is often more severe than perennial and can cause puffy eyelids and itching which can make symptoms worse. 

The best way to reduce discomfort and prevent an allergic reaction is to stay away from allergens as much as possible. Here are some tips on how to reduce exposure:

  • Minimize outdoor exposure during pollen season: 
  • Stay inside when pollen counts are particularly high or during a windy day.
  • Keep windows closed and use air conditioner with a clean filter.
  • Wear sunglasses outside to keep irritants from entering the eyes. 
  • Reduce indoor allergens:
  • Wash bedding frequently in hot water and use mite-proof covers on pillows, blankets and mattresses. 
  • Prevent household mold by reducing humidity and keeping areas that are subject to humidity or dampness (such as bathrooms, kitchens or basements) clean. Use a dehumidifier when necessary and clean any mold you see with bleach. 
  • To reduce dust, clean floors and surfaces with a damp rag or mop rather than sweeping or dry dusting. 
  • Wash your hands and clothes after coming into contact with animals.
  • DO NOT rub your eyes as this can worsen symptoms, greatly aggravating swelling and itchiness, and can sometimes even cause an infection. 

If you have severe allergies, avoid contact lens wear or reduce wear time when allergies flare up, as contact lenses can worsen symptoms and do not fit as they normally would when the eyes are swollen. This is why having back up glasses is so important. Changing to one day single use disposable contacts can also sometimes reduce allergy symptoms.   

There are some steps you can take to alleviate symptoms of eye allergies. Over-the-counter solutions include artificial tears, decongestant eye drops (which shouldn’t be used for longer than a week) or oral antihistamines (which can sometimes worsen symptoms). If no eye drops are available, cool compresses (avoid heat) will also help to reduce the itch.  If these treatments don’t work, you can get a prescription for stronger eye drops (antihistamine or short term steroid drops to reduce symptoms), oral antihistamines or possibly immunotherapy (such as allergy shots).

If you are experiencing symptoms of allergic conjunctivitis, don’t just assume they are allergies. See your eye doctor to determine the cause to ensure that it is not a more serious eye condition. 

How Contact Lenses Can be a Danger to your Eyes

puttingincontact

Most people wouldn’t consider contact lenses dangerous. In fact, they are a great alternative to glasses, offering convenience and great vision for those who wear them. However, when not obtained and used according to an eye doctor’s instructions, the consequences can be devastating.  

Contact Lenses Need to Fit

Like shoes, one size of contact lens does not fit all. Even daily disposable contact lenses need a proper lens fitting, as lens materials and curvatures vary from one brand to the next. Often patients that complain of contact lenses that feel dry within a couple hours of applying them are actually wearing contact lenses that are not an ideal fit. Many factors can affect a lens fit, including growth, allergies, medications, hormone changes, and others.   Sensitivities to eye drops and cleaning solutions may also affect comfortable contact lens wear.  

The Dangers of Contact Lens Use

We all know how uncomfortable it is when there is a foreign object in our eye. The tearing and watering that occurs as the eye’s natural attempt to remove foreign matter displays the eye’s sensitivity compared to other parts of the body.  Any time a foreign object comes into contact with the eye (even your finger), there is a risk to the eye – and that risk includes contact lenses.  Improper hygiene and useage of contact lenses can scratch the surface or bring bacteria into the eye which can lead to serious infections and permanent damage to the eye and vision.

According to a recent report from the Centers for Disease Control and Prevention, almost 20% of patients that reported infections of the cornea related to contact lenses had a corneal scar, a decrease in visual acuity or needed a corneal transplant as a result of the infection.  Further, 25% of infections involved poor contact lens hygiene, which means they likely could have been prevented.

Dangerous Behaviors that Put Contact Lens Users At Risk

Here are some of the most dangerous contact lens habits that should be avoided to eliminate your risk of eye damage or a potentially blinding eye infection.

  • Failing to wash your hands with soap and dry them before applying or removing lenses.
  • Rinsing contacts or your lens case with tap water, sterile water or other substances.
  • Re-using solution or topping off the solution in your lens case rather than emptying it, cleaning it and refilling it.
  • Failing to remove lenses before swimming or entering a hot tub.
  • Leaving in contact lenses too long or sleeping in contacts that are not meant to sleep in.
  • Failing to follow the wearing schedule prescribed by your eye doctor.
  • Using the same lens case for too long (it should be cleaned regularly and replaced around every three months).
  • Wearing lenses that are not obtained with a prescription through an eye doctor or legally authorized contact lens distributor.
  • Ironically, as you can see, water is one of the biggest dangers for contact lens wearers at it can harbor dangerous bacteria under the lens or in a contaminated lens case.  These dangers can be easily avoided by following your eye doctor’s instructions in handling and wearing your contact lenses.

Cosmetic/Decorative Contact Lenses

With Halloween on the way it’s important to stress that you should ONLY purchase contact lenses from an eye doctor or legally authorized contact lens seller with a prescription. Even if you are purchasing  purely decorative contact lenses with no vision correction, you need a doctor to measure your eye to ensure they fit properly.  Contact lenses are a medical device and it is illegal to sell them without proper authorization. Therefore you should never purchase them from a costume or party store – they are unregulated and could cause serious harm to your eyes and vision.

If you notice any unusual redness, discharge, crusting, light sensitivity or pain, immediately remove your contact lenses and go see your eye doctor as soon as possible. Some serious eye infections can cause permanent vision damage or loss even within a day or two.

While you should not approach contact lens use as a dangerous activity, it is important to understand the importance of proper hygiene and use.  As long as you obtain contact lenses safely and follow the instructions of your eye doctor, contact lenses are a safe, convenient and effective option for vision correction.

An Active and Eye Safe Lifestyle

man in glasses2

90%. That’s the number of sports eye injuries that studies show can be prevented using proper eye protection. Yet most sports leagues don’t require protective eyewear as part of their uniform or safety requirements. This leaves it up to athletes, parents and coaches to ensure that proper measures are taken to keep eyes safe during athletic play.

Protective sports eyewear can come in a number of forms depending on the sport, and includes sports glasses or goggles, eye shields and eye guards. Regular prescription eyeglasses or sunglasses do not protect the eyes and can sometimes cause greater injury if impact is made and lenses or frames are shattered or broken. If you do wear prescription eyewear, there are a number of options including wearing contact lenses with safety eyewear, purchasing prescription safety eyewear or wearing safety goggles over your regular prescription glasses.

What Makes Safety Eyewear Safer?

Protective eyewear is made of impact resistant lenses from materials such as polycarbonate or trivex, which are much stronger than other types of plastic used to make typical eyewear lenses. Polycarbonate has a long history of safety eyewear use in adults and children and Trivex is a newer optical material that is lighter than polycarbonate and offers better optical quality. Both materials have built in ultraviolet protection to protect your eyes from damage from the sun.

Sports frames are also made from strong, impact-resistant materials such as strong plastics or polycarbonates. They tend to cover larger areas than traditional glasses to protect more of the area around the eye and block dust, sunlight and other elements from entering from the sides or top of the frame. Sports glasses and goggles usually incorporate impact resistant padding to create a cushion between the frame and the face or nose for increased comfort, impact absorption and to prevent slipping.

Some goggles do not fit well under helmets, such as those used in football and lacrosse, so it is wise for athletes to bring in their helmets when shopping for sports eyewear to ensure they fit under the helmet properly.

Although athletes often shy away from wearing sports eyewear due to concerns of reduced performance, in reality they often can improve performance with new innovations in sportswear that offer improved peripheral vision.

Common Sports Eye Injuries

Eye injuries commonly occur in baseball, basketball, racquetball, tennis, badminton, and other sports. Here are some of the common types of injuries.

  • Scratched eye or corneal abrasion – This is when damage occurs to the external surface of the eye and commonly occur from being poked, scratched or rubbed when there is a foreign body present on the surface such as sand or dust. Corneal abrasions can be very painful, cause redness and sensitivity, particularly to light. Scratched eyes should be treated immediately by a doctor because bacteria can enter through the eye causing serious infections, that can even lead to blindness.
  • Blunt trauma/swelling – is when an object, such as a ball or an elbow impact the eye causing swelling or bleeding such as a black eye (in which the eyelids bruise and swell) or a subconjunctival hemorrhage (bleeding from a blood vessel between the white of the eye and the clear conjunctiva). Black eyes may not appear serious but they should be checked out by a doctor to make sure there is no internal damage.
  • Traumatic iritis – an inflammation that occurs following an eye injury such as a blunt trauma that affects the color part of the eye that surrounds the pupil. The inflammation should be treated to ensure there is no permanent vision loss.
  • Penetrating injury – injuries that occur when a foreign object enters the eye, causing the eye to rupture, can cause severe damage, swelling and bleeding. These should be considered a medical emergency and treated immediately.

As you can see, most of these injuries can be prevented simply by wearing proper protection over the eye. Your vision is essential for playing the sports you love, so don’t put it as risk by failing to protect your eyes properly. With the increasing selection of frames and lenses for safety and sports eyewear at affordable pricing, an active lifestyle can also be safe.

10 Tips to Teach Children About Eye Safety

girl in funny glasses

It is important to teach your children about eye health and safety from a young age. This includes awareness about how your overall health habits affect your eyes and vision as well as how to keep your eyes safe from injury and infection. Starting off with good eye habits at a young age will help to create a lifestyle that will promote eye and vision health for a lifetime.

10 Eye Health Tips for All:

  1. Eat right. Eating a balanced diet full of fresh fruits and vegetables (especially green leafies such as kale, spinach and broccoli) as well as omega-3s found in fish, such as salmon, tuna and halibut, help your eyes get the proper nutrients they need to function at their best.
  2. Exercise. An active lifestyle has been shown to reduce the risk of developing a number of eye diseases as well as diabetes – a disease which which can result in blindness.
  3. Don’t Smoke. Smoking has been linked to increased risk of a number of vision threatening eye diseases.
  4. Use Eye Protection. Protect your eyes when engaging in activities such as sports (especially those that are high impact or involve flying objects), using chemicals or power tools or gardening. Speak to your eye doctor about the best protection for your hobbies to prevent serious eye injuries.
  5. Wear Shades. Protect your eyes from the sun by wearing 100% UV blocking sunglasses and a hat with a brim when you go outside. Never look directly at the sun.
  6. Be Aware: If you notice any changes in your vision, always get it checked out. Tell a parent or teacher if your eyes hurt or if your vision is blurry, jumping, double or if you see spots or anything out of the ordinary. Parents, keep an eye on your child. Children don’t always complain about problems seeing because they don’t know when their vision is not normal vision. Signs of excessive linking, rubbing, unusual head tilt, or excessively close viewing distance are worth a visit to the eye doctor.
  7. Don’t Rub If you feel something in your eye, don’t rub it – it could make it worse or scratch your eyeball. Ask an adult to help you wash the object out of your eye.
  8. Give Your Eyes a Break. With the digital age, a new concern is kids’ posture when looking at screens such as tablets or mobile phones. Prevent your child from holding these digital devices too close to their eyes. The Harmon distance is a comfortable viewing distance and posture – it is the distance from your chin to your elbow. There is concern that poor postural habits may warp a child’s growing body. Also, when looking at a tv, mobile or computer screen for long periods of time, follow the 20-20-20 rule; take a break every 20 minutes, for 20 seconds, by looking at something 20 feet away.
  9. Create Eye Safe Habits. Always carry pointed objects such as scissors, knives or pencils with the sharp end pointing down. Never shoot objects (including toys) or spray things at others, especially in the direction of the head. Be careful when using sprays that they are pointed away from the eyes.
  10. Keep Them Clean. Always wash your hands before you touch your eyes and follow your eye doctors instructions carefully for proper contact lens hygiene. If you wear makeup, make sure to throw away any old makeup and don’t share with others.

By teaching your children basic eye care and safety habits you are instilling in them the importance of taking care of their precious eye sight. As a parent, always encourage and remind your children to follow these tips and set a good example by doing them yourself.

Of course don’t forget the most important tip of all – get each member of your family’s eyes checked regularly by a qualified eye doctor. Remember, school eye screenings and screenings at a pediatrician’s office are NOT eye exams. They are only checking visual acuity but could miss health problems, focusing issues and binocularity issues that are causing health and vision problems.

When 20/20 Vision isn't Enough For Your Child

boy 20in 20front 20of 20eye 20chart

Since studies show that learning is 80% visual, children with untreated vision problems can really suffer when it comes to school. Most people think that good “vision” means 20/20 acuity but in reality, vision is much more complex.  Your brain is actually what completes the processing of the visual world around you and visual processing disorders can be present even when there is no evidence of a so-called “vision problem”.    

The American Optometric Association reports that 2 out of 5 children have a vision condition that affects learning and estimates that 10 million American children have undiagnosed and untreated vision problems. In Canada, it’s reported that one in 4 school age children have undiagnosed vision problems, many with no obvious symptoms.

A major reason for this is that when parents and teachers see issues in school, they often run to learning or behavioral issues first. In reality, difficulty in reading, understanding, focusing, paying attention and even disruptive behavior can all be symptoms of an underlying vision disorder.

There are a number of skills that we need in order to successfully see and process the outside world. These include, eye teaming (being able to use the eyes together as a team), focusing, tracking, recognition and comprehension. When these skills are delayed or insufficient, learning, reading, understanding and motor skills can all be affected.  Most of these visual processing issues cannot be treated by corrective glasses or contact lenses alone. Sometimes a regime of vision therapy exercises may be prescribed to teach the brain how to properly process the information that is coming in through the eyes.

Vision Therapy

Vision therapy often involves a combination of glasses, to optimize visual acuity if needed, and  therapeutic exercises designed to train eye coordination and comfortable focusing ability.  Typically, there is a comprehensive in-office assessment, then half-hour in-office sessions once every 1-3 weeks.  The patient is given home eye exercises to be done 15-20 minutes per day, often with help from the parent.   

Vision therapy is a process that can take up to several months before improvement or goals are met.  In addition, going through vision therapy does not ensure that your child will get better grades, we are simply trying to give them all the proper learning tools so they can achieve to their fullest potential.

Identifying Vision Disorders

One example of a visual processing disorder is Convergence Insufficiency (CI), a common eye coordination disorder in which the eyes have problems viewing near tasks due to convergence problems. This is when the eyes have difficulty working together and focusing as a team, resulting in eyestrain, headaches and double vision. Children with CI often report that words appear to be “moving across the page”, making reading and comprehensive impossibly difficult.

As with many vision problems, children often don’t realize that their experience is abnormal so they often don’t report the difficulties they are having. Here are some indications that your child might have a vision problem:

  • Headaches
  • Avoiding close tasks such as reading or playing certain games
  • Frequent Blinking and Eye Rubbing
  • Difficulty reading – losing place frequently
  • Covering one eye when trying to focus
  • Double vision
  • Poor memory or reading comprehension
  • Short attention span
  • Clumsiness or poor hand-eye coordination

If your child is having difficulty in school, particularly with tasks involving reading, it is worth getting an eye and vision exam.  The sooner a visual processing issue is diagnosed and treated, the greater chance your child with have to thrive and enjoy the school years.

Cutting Edge Eye-dentification

blue 20eye 20between 20fingers

We have all seen the futuristic thrillers that use high-tech eye scanning identification systems but nowadays the technology does exist to use them in real life. A greater number of high security establishments have begun to use iris recognition for identification and security systems.  

How does it work?

The iris is the colored part of the eye that forms a ring around the black pupil that is responsible for contractions of the pupil to let in more or less light.  It is also the only internal organ that is visible from outside the body.  Like a fingerprint, the colors and patterns of the iris are completely unique to each individual, and this unique texture usually doesn’t change throughout a person’s lifetime. Because of these characteristics a scan of the iris is a highly reliable source of personal identification.

Iris recognition measures these unique patterns and textures through a specialized camera which captures an image of the iris from about 3-10 inches away.  Iris recognition is considered one of the most accurate forms of biometrics (the use of body measurements for identity checks) because it is non-intrusive, fast and accurate.  As a comparison, while fingerprint identification uses 40 unique characteristics, the iris has 256 unique markers.

In order for iris recognition to work, your iris first needs to be scanned and enrolled into the system so it can recognize your identity. Enrollment requires your eyes to be photographed using both ordinary and infrared light which helps to highlight the unique patterns present in the iris. These digital photographs then go through a specialized analysis that identifies the unique features (the 256 markers mentioned above) and then stores the information as a 512-digit number (your IrisCode®) along with your name and personal details into a database.  This all happens within a few minutes.

Once you are in the system, you simply need to stand in front of the iris scanner and within minutes your iris can be verified.

Limitations of Iris Scanning

The markers on your iris usually remain unchanged throughout your lifetime except in cases of extreme injury to the eye, inflammation (such as iritis) or changes due to cancers. Additionally, certain surgeries for glaucoma involve removing part of the iris (iridectomy) or using lasers to put holes in the iris (iridotomy) which would also change the iris pattern. Lastly, certain tinted contact lenses could be a complication with iris scans because some of them have an artificial iris pattern imprinted on them. Nevertheless, iris scanning is still considered to be the most accurate and effective form of biometric identification.  

 

Iris scanning is already being used in airports, military and prison institutions, high security government and corporate institutions and even at ATM and bank tellers.  Looking into the future, it is likely we will see much more of this technology in common use.

Innovations in Color Blindness

clipart 048

There have been a lot of videos going viral lately of color blind people “seeing color” for the first time using specialized glasses. The emotional reactions of amazement, shock and joy even lead some to break down into tears. The glasses provide these individuals a way to view the world in vibrant, living color, as everyone else around them is able to.

One in every 12 men and one in every 200 women have some degree of color blindness or color vision deficiency (CVD). The condition is not actual blindness, but an inability or a decreased ability to see color and perceive differences in color. CVD can be a partial or total deficiency, although total color blindness is not as common. There are two main types of color blindness:

  • red-green – which is most often inherited from the mother’s side on the x chromosome, and

  • blue-yellow – which is much more rare and usually occurs from damage to the nerve. CVD can sometimes be acquired through disease, brain injury or certain drugs or chemical reactions

The World of the Color Blind

Contrary to common misconceptions, a person who is color blind does not see only grey.  He still usually sees color to some extent, but often the colors appear dull or washed out and can be easily confused with other colors. People often have trouble identifying or naming certain colors or distinguishing colors, for example, red and green, as well as orange, yellow and brown may appear similar, particular in low light situations. In fact, while people with normal color vision typically see about one million unique shades of color, individuals with color deficiency are only able to perceive 5-10% of that.

People with color deficiency often do not know they are color blind until they are tested. They assume everyone else perceives colors the same way. Often individuals are tested when they are seeking out certain career paths in which it is essential to distinguish colors such as pilots, electricians or police officers among others.  

Innovations in Color Vision

Color blindness can impair certain aspects of daily life and limit certain activities or job options and therefore there are a number of companies out there working on technology to overcome these difficulties. While there is no cure for CVD, there are aids available that can sometimes assist with increased color perception.  

Eyeglasses/Sunglasses

There are a couple of brands of color enhancing glasses available that help some individuals with red-green colorblindness.

Both EnChroma and o2Amp Oxy-Iso Color Correction Glasses work for about 80% of people with red-green colorblindness – which means that not everyone will have the same experience as those that appear in the videos. The lenses enhance color perception by filtering out the light into different spectral components. EnChroma has two versions – indoor, designed for looking at computer screens and outdoor, sunglasses.  

Another solution is a custom designed ColorCorrection System in which contact lenses and glasses are customized for the individual and are available with or without a prescription. These lenses work by changing the wavelength of the colors as they enter the eye to enhance color discrimination and perception.

Apps for CVD

There are a growing number of apps available for smartphones and tablets that serve as color vision aids for those with CVD.  One example is the Colorblind Avenger which is a color identification program will allows the person to use their mobile device as a visual aid. The user takes a photo or selects an existing photo and when he touches an area on the image the app displays the color of the selected area.

Huevue is another app of colorblind tools that help people with CVD identify, match and coordinate colors. There are many other apps available out there to help aid those with CVD and educate others about living with the condition.

There are even video games and software design tools that are now created with colorblind modes to allow use by people with CVD. While none of these tools and aids are able to restore color vision permanently, they do allow those with the condition to live a more vibrant life.