Various studies highlight a different sensitivity to certain conditions or even a disparity in the development of certain diseases depending on eye color.
The eye color in an individual depends on several genetic factors and the concentration of melanin present in the iris. In view of the studies conducted to date, this color difference has no influence on the quality of vision.
On the other hand, several studies demonstrate disparities in resistance to certain pathological conditions.
Here is a non-exhaustive list of these differences:
Dark eyes
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Light eyes
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- A study in the American Journal of Ophthalmology shows that people with dark eyes are 1.5 to 2.5x more likely to develop cataracts (visual disturbance when the lens becomes cloudy). It is a normal process of aging but it occurs more pronounced in these people.
- According to a study from the University of Pittsburgh, sensitivity to stress is more pronounced in people with dark eyes. They would be more anxious, depressed, prone to negative thoughts and prone to sleep disorders.
- Atlanta University conducted a study on resistance to the effects of alcohol during heavy drinking. It appears that people with dark eyes are more sensitive to these effects.
- A 2012 study shows that the risk of vitiligo (autoimmune skin depigmentation disease) is more common in people with dark eyes.
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- The University of Pittsburg conducted a study with pregnant women and it appears that women with light eyes tolerated the pain of childbirth better. In general, it seems that people with light eyes are more resistant to pain.
- People with light eyes have 2x more risk of AMD. Here eye color is a risk factor for AMD in the same way as tobacco, overweight, cholesterol and hypertension.
- People with light eyes are also more prone to developing type I diabetes and ocular melanoma (eye cancer).
- The study conducted by the University of Atlanta on the effects of alcohol highlights a better resistance to the effects of alcohol in people with light eyes. However, this has the consequence that these people therefore tend to drink more and more often. Cases of alcoholism are therefore more frequent in people with light eyes.
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Dark eyes or light eyes, no winner, no loser.
To know more :
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4206898/
