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How Contact Lenses Can Be a Danger to your Eyes

puttingincontactMost 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.

Innovations in Color Blindness

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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.

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