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Author: feccontent

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.

Poolside Eye Safety

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Whether it is the sea, the sand, the sun or the softball field, summer brings people outside and this creates exposure to a multitude of potential dangers to the eyes.

One risk that is possibly the least obvious is the swimming pool. Swimming pools are the culprit for multitudes of eye infections, irritations and sunburns each year.

Here are 3 tips for keeping your eyes safe in and around the swimming pool.

  1. Cover Your Eyes Poolside

    Sunlight reflects off water, sand and even cement, increasing exposure. Any time you are in the vicinity of a water source keep your eyes covered with 100% UV blocking sunglasses and a wide brimmed hat. Start this habit early. UV radiation builds up over your lifetime and has been linked to eye diseases such as cataracts and macular-degeneration in adults. Additionally, even short amounts of exposure to intense sunlight can lead to a sunburn of the eye or photokeratitis (see below for treatment), which can be painful and affect vision temporarily.

  2. Remove or Protect Contact Lenses

    Contact lenses can trap bacteria and microscopic organisms found in water inside your eye resulting in eye infections and irritation. Further, if contacts are worn underwater, they might fall off if you open your eyes. Lastly, there is risk that chlorine or other contaminants will bind onto the contact lens, and certain chemicals cannot be cleaned off or disinfected properly. The best solution is to wear non-prescription swimming goggles over your lenses to keep water and harmful organisms out of your eyes. Prescription goggles are also available for those who prefer to remove their contacts. If you must swim with contact lenses, remove them immediately after you leave the pool and discard or disinfect them thoroughly. It’s preferable to use 1-day disposable contact lenses during water activities, to reduce risk of water contaminating the contacts. Daily disposable lenses allow you to discard the lenses immediately after leaving the water and to start with a fresh lens.

  3. Wear Goggles

    Swimming goggles are a good idea even for those who have no vision problems. They protect your eyes from the organisms in the water and from chemical irritants such as chlorine and yes, even urine, which are often found in pools. Your eyes will feel much better after swimming if they haven’t been exposed to the water.

How to Treat Sunburned Eyes:

The cornea at the front of the eye can develop a sunburn from extensive exposure to UV radiation. You can tell you have sunburned eyes when the white of the eye becomes bloodshot and your eyes are sensitive to light and have a gritty feeling (like there is sand in your eye). They may also become sore and sometimes you may experience blurred vision.

If you are experiencing discomfort it may help to soothe your eyes with lubricating eye drops, to rest and to stay out of sunlight as much as possible. Sometimes anti-inflammatory eye drops may be required. Usually the symptoms will resolve themselves within a couple of days. If your symptoms persist longer than two days or worsen, visit your eye doctor immediately.

Avoid eye sunburns and the cumulative effects of the sun on your precious eyes by always wearing 100% UV blocking sunglasses – rain or shine!

Cataract Awareness Month: What to Expect from Cataract Surgery

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After the age of 50 most people will eventually be diagnosed with cataracts. Cataracts are when the natural crystalline lens of the eyes become clouded, causing vision impairment that can not be corrected by glasses or contact lenses. While commonly an age-related condition, occasionally there are infants born with a congenital cataract, and it’s possible for young people to develop a cataract related to trauma, injury or infection.

Cataracts are one of the leading causes of visual impairment and the leading cause of blindness worldwide. As of 2010 they were responsible for 51% of world blindness and as life expectancy continues to grow, so does the incidence of cataracts. The condition can be cured by surgical removal of the cataract, which is one of the most common surgeries performed in the United States and Canada.

Cataract surgery involves removing the clouded natural crystalline lens of the eye and replacing it with a clear intraocular lens (IOL). It is typically an outpatient procedure which does not require an overnight stay. Cataract surgery is one of the safest and most effective surgeries performed in North America today, having a 90% success rate (patient has improved vision, between 20/20 and 20/40 following the procedure).

Implants (IOLs)

In this day and age, there are several types of implants available. Traditionally, implants have been single vision where the patient’s new lenses are optimally focused for distance vision in both eyes. This usually necessitates the use of reading glasses after the surgery. Implants can also be done in what is called monovision, in which one eye is focused for distance and the other focused for reading. People that have previously used monovision contact lenses are usually able to tolerate this with surgery as well. Recently, there have been many advances in the use of bifocal and multifocal implants. Like glasses, these implants try to give a patient vision at all distances without having to use glasses. Your eye doctor can counsel you on the best option based on your history and prescription. No matter which correction type is chosen for cataract surgery, since presbyopia continues to worsen with age, eventually most patients do require reading glasses again.

Before the Surgery

Cataract surgery is not for everyone. Your eye doctor may advise that your cataracts (and therefore vision) are not bad enough yet to necessitate treatment. Additionally there may be other risk factors or issues with the health of your eyes that could contraindicate the option of surgery.

A comprehensive eye exam will be performed to check your overall eye health and your vision. During the pre-surgery exam, measurements will be taken of your cornea and your eye as well, to help fit the right intraocular lens for your eye and vision needs. You will also be asked to go over a brief medical history including any medications (including over the counter medications) and supplements that you take to ensure the success of the surgery. For example, some medications, such as Flomax, can can affect the iris causing floppy iris syndrome, which creates a challenge for the cataract surgeon.

During the Surgery

The entire procedure from start (pupil dilation and administration of local anesthetics and sometimes a sedative to relax) to finish (post-operative evaluation and discharge) will probably take about an hour to an hour and a half. Nevertheless the actual surgery – removing the clouded lens and replacing it with the IOL – typically takes only about 15 minutes. You will not feel or see the IOL after the implant.

There are lasers that are sometimes used to assist with cataract surgery, creating precise incisions. However a skilled cataract surgeon is still required for the procedure.

Post-surgery

You will not be able to drive home from the procedure and shouldn’t drive until you have been given approval by your eye doctor after a follow-up exam the next day. You will be required to take medicated eye drops for a number of weeks following the surgery to prevent infection, control eye pressure and reduce inflammation. It is important to take the eye drops as directed by your doctor to avoid complications.

You will also need to protect your eyes from bright light with sunglasses and to wear a protective shield at certain times, such as when you are sleeping. It is advised to avoid strenuous activity, swimming or any other activities that would put your eyes at risk of getting dirty or infected for at least a week following the procedure.

Vision will usually begin to improve within a few days of the procedure. You may however experience some blurred vision or redness for a number of days or weeks during the healing process. It is normal to feel some initial discomfort or itchiness in the days following the surgery. If you have cataracts in both eyes, your doctor will probably schedule a second surgery a month or two after the first to allow your eye to heal properly before undergoing the second procedure.

If you experience any serious symptoms such as loss of vision, persistent pain or redness, flashes or floaters or nausea contact your doctor immediately.

The majority of patients will still need eyeglasses at least sometimes following the surgery so once your eyes have healed your doctor will fit you for a prescription. Secondary cataract can occur months or years after the initial cataract surgery. This is when an opacity develops behind the IOL and can mimic cataract symptoms. Regular checkups with your optometrist can detect this, and arrangements for a simpler laser treatment instead of surgery can resolve this problem.