What is Colorblindness?

Colorblindness is an interesting thing to most people because we wonder what it must be like to not distinguish some colors—a function of vision that we take for granted. Most people can live with colorblindness because it is present as soon as they are born and many go years without realizing that they do not see a full array of colors.

Certain tasks may be difficult or impossible, but even without seeing as many distinct colors as possible, these people function fine in everyday life. Colorblind tests exist to diagnose people who have color vision deficiency, and new advancements have even created eyewear to help people see more of the colors they are missing depending on their deficiency.

The cause of color blindness usually involves faulty cones. Cones are cells in your eyes that distinguish the three wavelengths of light that we see. Light can be split into red, green, and blue for the spectrum visible to humans. Color blindness can happen because the cone cells are faulty in some way and do not show distinct colors. A person may see shades of yellow and blue, for example, but have problems distinguishing red and green. Many people believe that color blindness means seeing only in black and white, but that is far more rare than typical color blindness.

Also, color deficiency is much more common in men than women. Only up to 1% of the female population has trouble seeing various colors, where somewhere between 8-12% of the male population is color blind.

Color blindness is usually an inherited genetic deficiency with the cones, but symptoms of color blindness may also occur due to stroke, old age, or a problem with pathways from the cones to the brain where the brain can determine colors.

More and more people are able to afford relatively new technology that helps us see more distinct colors. People who are not color blind can use special glasses to see a more saturated and distinct view of colors, but those with color deficiencies are seeing some colors that they have never seen before. These special color vision glasses are a favorite subject of YouTube videos where people give their friends the gift of color and film the shocking experience.

Curious about your own color perception? Learn more about it here, and test your color vision!

Why is my eye twitching?

Probably everyone has had that feeling: ahh, my eyelid is twitching. You never know how to make it stop, how long it will keep going, or why it’s happening. The truth is that eyelid and eye twitching and spasms are pretty common, and no cause for alarm, but still somewhat of a mystery!

Usually it’s the bottom lid of your eye that twitches when you get that weird feeling. Most people report that a random eye twitch will come and go, but some cases have been reported as lasting weeks or even months! The proper term for this condition is myokymia.

What triggers eye twitches?
• Stress
• Being tired
• Strained eyes
• Caffeine
• Alcohol
• Dry eyes
• Nutritional deficiencies
• Allergies

Generally the condition is not serious, and is not an indication of any greater issues. The problem is that it’s not easy to treat when you don’t know the cause. The afflicted person usually needs to investigate their habits and get to the root cause so that they can avoid that trigger.

If you find that your trigger is strained eyes, make sure to see an eye care professional as soon as possible so that you can update your prescription. If your prescription is up to date or you don’t need one, it could be strain from looking at a computer screen for extended periods. In this case, you can still benefit from seeing an eye care professional and discussing special computer glasses to help you relieve the stress on your eyes.

Of course, if you’re stressed or tired in general, an eye care professional probably can’t do much for you. Make sure that you’re getting enough restful sleep, take an afternoon nap if you find that you hit the afternoon slump hard, and go to bed early to get more sleep. Talk to your physician if you’re getting enough sleep on a good bed and still feeling fatigued.

Drinking too much caffeine every day? It might be another facet of your stressed-out life that can exacerbate your eyelid-twitching problem. It’s tempting to partake in another caffeinated beverage mid-afternoon when you’re busy and can’t nap to perk back up. Building up more and more caffeine, however, can be a real problem and can lead to eye spasms that will hurt your productivity and be a big annoyance.

How can allergies make your eyelids twitch? Well, some experts think that the histamine that is released into your eye tissues when you rub your eyes can actually cause the lid to twitch. Since allergies can make your eyes itch, rubbing them might be causing your eyelids to twitch as well.

Cramping and muscle spasms in all parts of your body can be caused by electrolyte imbalances. It’s one of the reasons that athletes opt for sports drinks over water. Sweat carries electrolytes out of your body, so they need to be replaced to make sure your brain and muscles function properly. If you have been sweating heavily or have a nutritional or other health issue, you may be low on electrolytes. See your physician if you think you may have a condition causing you to have low electrolytes.

The takeaway from this is that there’s no cause for concern, but that doesn’t mean it’s not annoying! The occasional eye twitch is nothing to investigate, but persistent twitches will certainly be irritating enough to warrant a look at your habits and possibly making some healthy changes.

Preventing Computer Vision Syndrome

It’s the end of the week and you’ve only got a few hours left before the weekend. As you try to finish the last of your tasks, you find yourself unable to focus—not just mentally, but physically. You have trouble seeing the screen in front of you. Maybe your vision is blurry or your eyes start to burn. These are symptoms of computer vision syndrome.

Computer vision syndrome is simply the name given to a group of symptoms and problems associated with overuse of computers and strained eyes from excessive computer use. It’s becoming a more common problem as more people work in offices behind computers, and rely on tablets or smartphones instead of paper. These devices have helped make us more productive with faster communication and easier record-keeping, but the reliance on electronic screens in front of our faces can also be a problem for our eyes.

There are many things you can do to prevent or relieve the symptoms of computer vision syndrome. If you wear glasses, make sure your prescription is up to date. If you do not wear glasses (or if you wear contact lenses that you’re sure are an appropriate prescription for you) yet still experience discomfort while on a computer, computer glasses may be what you’re looking for.

Computer glasses are different than traditional eyeglasses or reading glasses. Due to such a short distance between your eyes and the computer screen, distance eyeglasses and reading eyeglasses may not be as effective for your eyes. They’re not necessarily meant for focusing for longer periods on the intermediate zone of vision. Made specially for viewing a computer screen, computer glasses help you focus on this very zone where your monitor sits, making daily use much more comfortable.

Without a proper prescription or an aid like computer glasses, those experiencing blurred vision may end up leaning forward in order to see. This can negatively affect posture and cause even more strain on your body. In addition to eye health, it’s very important to have a healthy workspace and comfortable posture.

Because computer glasses have a modified lens, they give you the most comfortable view of your computer screen. For maximum viewing quality, the lenses should include anti-reflective coating. Tinted computer lenses are also recommended in order to block out blue light that is emitted from computer screens.

With a decrease in eyestrain, and no more blurred vision or headaches, it’s obvious how much computer glasses can help make you feel better and more productive. Ask your eye care professional if you’re interested in learning more about computer glasses and how they can help prevent computer vision syndrome.

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