Does Eye Color Affect Vision? How Eye Color Impacts Vision and Eye Health
There once was a brown-eyed girl who wondered whether any vision changes lay behind blue eyes. Did it matter if someone had Bette Davis eyes? Are ocean eyes better for visual acuity?
But seriously—does eye color affect vision? What does the science say? Let’s talk about the connection (or lack thereof) between those baby blues—or browns or hazels—and how well you can see.
Does Eye Color Impact How Well You See?
Nope. The short answer is that eye color plays no significant role in how well you see. Which eye color has the best vision? That thread leads nowhere. Eye structure, genetics, and the health of individual eye components are the primary factors that determine what sort of vision you can look forward to.
But the long answer is worth exploring, too. The next time you’re outside with a group of friends on a sunny day, pay close attention to how the rays impact everyone. There’s a good chance that those with lighter eyes will be a little squintier than their dark-eyed counterparts.
It’s not due to eye color, per se. But it is due to one of the primary determinants of your particular hue: melanin.
Light Sensitivity and Melanin Levels in the Eye
Melanin is the pigment that determines skin color, but it plays an important role in eye color as well. More melanin means darker irises; less melanin means lighter irises. So people with light blue, green, or gray eyes simply aren’t rocking as much melanin as those with brown eyes (the most common eye color).
What does this have to do with squinting? Lighter eyes are more sensitive to light because of the lack of melanin. That also means they’re slightly more susceptible to UV damage—more on that below.
Eye Color and Visual Health Risks
While it’s true that increased melanin provides a degree of natural protection from UV exposure, this protection is limited.
In other words, everyone should protect their eyes with sunglasses that block harmful UV rays. It doesn’t matter whether you have shimmering amber irises or eyes so dark they almost look black—the melanin protection only gets you so far. Wear sunglasses. Protect your eyes.
Much of the science isn’t settled when it comes to eye color and health risks, but let’s look at a few potential correlations that have been observed.
Uveal Melanoma
The most common form of eye cancer in adults is significantly more prevalent in individuals with lighter eyes, especially green or hazel irises. Melanin may play a role. Genetics probably come into play as well. But the exact reason is still unknown.
Pinguecula/Pterygium
Both conditions are growths on the conjunctiva, or the clear membrane that covers the white of your eye. And for both, UV radiation is a major risk factor. So again, those with light eyes are slightly more at risk, but wearing protective sunglasses decreases the risk for everyone.
Snow Blindness
Your skin and your eyes can both get sunburned. A sunburn of the eyes is called snow blindness (or photokeratitis), as it often results from UV light reflected off snow or ice. Eye color is not a factor here—at least not directly. Since people with light eyes are more sensitive to bright conditions, they may be more inclined to take action sooner, putting on sunglasses or getting away from the glare. These actions might lead to less exposure than those with dark eyes. But the exposure is the real culprit here. Again, protection is key.
Which Eye Color Gets the Most Cataracts?
People with dark brown eyes get more cataracts than those with lighter eye colors. Why? Good question. Some scientists think it has to do with melanin. Once again, UV damage is a factor, but in this case, it might be that the melanin in dark brown eyes leads to greater heat absorption or concentrates the UV rays in a way that leads to higher cataract rates.
This fact might help you at bar trivia, but for practical purposes: Everyone is at risk of developing cataracts. Be sure to protect your eyes from UV damage with sunglasses.
What’s the Healthiest Eye Color to Have?
Overall, there isn’t a healthiest eye color. There are risk factors across the board and, aside from the melanin factor, eye color simply does not play into vision health.
You might also wonder what eye color is most likely to need glasses. But eye color is not a factor here either—vision problems are mostly a matter of eye structure, genetic predisposition, and sometimes lifestyle factors.
At Visionworks, we think healthy eyes are the most beautiful—no matter the color. If you’re not a huge fan of what you were born with, or just feel like changing things up, choose some colored contacts to try. There’s no wrong choice—as long as you get regular eye exams and wear UV-resistant sunglasses.
Why Regular Eye Exams Matter for Everyone
At the end of the day, while eye color might matter on your dating profile and driver’s license, vision health simply doesn’t care about eye color. Vision impairments and eye conditions can impact people of any eye color—which is why it’s so important to make sure you get annual eye exams.
No matter your eye color, eye exams can help you catch potential issues and protect your eye health. It’s the one thing everyone can agree on: blue eyes, hazel eyes, amber eyes—even people who claim their eye color has permanently changed.
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Information received through Visionworks® content is for informational purposes only and does not constitute medical advice, medical recommendations, diagnosis, or treatment. Always seek the advice of your eye doctor, physician, or other qualified health provider with any questions you may have regarding a medical condition.
Claims regarding blue light efficiency are supported by manufacturer-provided test results.
