Reindeer is the only mammal to change eye color to adjust the amount of light that enters the eyes in different seasons. They have golden eyes in summer and blue in winter.
According to a 2003 MIT study, the presence of eyebrows is more important in facial recognition than the presence of eyes.
There’s a surgery that claims to change the color of your eyes. The surgery involves taking a laser and burning away the melanin layer of your iris. Over the course of a few weeks, your eyes naturally turn from brown to blue as the damaged melanin is removed by your body.
Your eye’s pupil got its name from Latin “Pupilla”, which means little doll. Because that’s what you see when you look into someones pupil, the little doll version of yourself.
A man developed a star-shaped cataracts in his eyes after sustaining a 14,000-volt shock to his left shoulder.
The human eye is sensitive enough that – assuming a flat Earth and complete darkness – you could spot a candle flame flickering up to 30miles (48 km) away.
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye’s lens. People who undergo surgery to remove the lens can detect ultraviolet light.
Some women can have a genetic mutation which causes them to gain a 4th color-vision cone in their eyes, allowing them to see millions of more colors.
A small number of humans may be born with Heterochromia iridum, or dual eye coloration. One eye may be blue, and the other brown or hazel. Causes of eye color discrepancies may stem from genetic mutations, combinations of distinct cells. Although most people with this “condition” are born with it, rare cases of medication induced Heterochromia have been reported.
If your immune system received access to the inside of your eyes, it would attack and destroy them as invaders. Similarly, if you damage one of your eyes and it isn’t removed and stays in your eye socket your body will make antibodies against it, which will end up attacking and destroying your good eye. …and this sometimes happens.