TOP 10 Scientific Facts About Eyeballs
- 6 years ago
TOP 10 Scientific Facts About Eyeballs :
10. Some Eyes Are Blue For The Same Reason The Sky Is Blue :
The answer how do the eyes look blue is something called the Tyndall effect. This means the light completely scatters and none is absorbed. (In green eyes, they have little melanin and no extra collagen, so some light is absorbed and some is scattered.) This means in high light or low light, blue eyes will look different, since they have no actual color.
9. The Size of Eyes Are Not The Same As When We Was A Baby :
Eyes change in size less than any of our other body parts, they still do grow. Our eyes grow the most from infancy up until age two; by the time we reach adolescence, the growth of our eyes typically stops.
8. You Blink Thousands Of Times A Day :
People blink a lot, probably around 15 times per minute, 900 times an hour and 14,400 times per day. On a biological level, we blink to keep our eyes lubricated. Men and women blink about the same number of times.
7. Retinal Scans Are More Secure Than Fingerprint :
Someone can alter their fingerprint, but you're not going to be altering your retina anytime soon. The retina is comprised of blood vessels in a pattern unique only to you - even identical twins have different retinas.
6. Blinking Gives Your Brain A Break :
Research from 2012 indicates blinking may have a function other than lubricating our eyes. A study in Japan showed blinking can give your brain a brief respite. When people would blink, the brain would go into "rest" mode.
5. Color Blind People Don't See In Black And White :
99% of colorblind people can see colors, they are just unable to distinguish between certain hues due to missing or mutated cones in the eye. People who are affected by red-green form of color blindness would not be able to distinguish the letter in the above illustration, but they would still be able to see certain colors and hues.
4. Heterochromia Doesn't Just Affect Animals :
Heterochromia, the striking condition that gives dogs like Australian Shepherds and Huskies two different colored eyes, can occur in people too - it's just much more rare. Six in 1,000 people experience heterochormia, which is less than 1%. It is a harmless genetic mutation.
3. That Puff Of Air At The Eye Doctor Is Important :
The tonometry test checks your eye pressure; higher eye pressure is related to glaucoma. The thing about high eye pressure is that you won't feel it, so the glaucoma test is imperative. Higher pressure can damage the nerves in your eyes, and that can eventually lead to blindness.
2. Babies Can Have Some Weird Stuff Going On With Their Eyes :
Some babies have wide nasal bridges or large eyelid folds, and this can create the illusion of having crossed eyes. Newborns don't cry tears when they cry - so while they may be screaming, you're not going to see any tears until they're 1-3 months old.
1. The Way Eyes Actually Receive Images :
science, united states of america, united kingdom, canada
10. Some Eyes Are Blue For The Same Reason The Sky Is Blue :
The answer how do the eyes look blue is something called the Tyndall effect. This means the light completely scatters and none is absorbed. (In green eyes, they have little melanin and no extra collagen, so some light is absorbed and some is scattered.) This means in high light or low light, blue eyes will look different, since they have no actual color.
9. The Size of Eyes Are Not The Same As When We Was A Baby :
Eyes change in size less than any of our other body parts, they still do grow. Our eyes grow the most from infancy up until age two; by the time we reach adolescence, the growth of our eyes typically stops.
8. You Blink Thousands Of Times A Day :
People blink a lot, probably around 15 times per minute, 900 times an hour and 14,400 times per day. On a biological level, we blink to keep our eyes lubricated. Men and women blink about the same number of times.
7. Retinal Scans Are More Secure Than Fingerprint :
Someone can alter their fingerprint, but you're not going to be altering your retina anytime soon. The retina is comprised of blood vessels in a pattern unique only to you - even identical twins have different retinas.
6. Blinking Gives Your Brain A Break :
Research from 2012 indicates blinking may have a function other than lubricating our eyes. A study in Japan showed blinking can give your brain a brief respite. When people would blink, the brain would go into "rest" mode.
5. Color Blind People Don't See In Black And White :
99% of colorblind people can see colors, they are just unable to distinguish between certain hues due to missing or mutated cones in the eye. People who are affected by red-green form of color blindness would not be able to distinguish the letter in the above illustration, but they would still be able to see certain colors and hues.
4. Heterochromia Doesn't Just Affect Animals :
Heterochromia, the striking condition that gives dogs like Australian Shepherds and Huskies two different colored eyes, can occur in people too - it's just much more rare. Six in 1,000 people experience heterochormia, which is less than 1%. It is a harmless genetic mutation.
3. That Puff Of Air At The Eye Doctor Is Important :
The tonometry test checks your eye pressure; higher eye pressure is related to glaucoma. The thing about high eye pressure is that you won't feel it, so the glaucoma test is imperative. Higher pressure can damage the nerves in your eyes, and that can eventually lead to blindness.
2. Babies Can Have Some Weird Stuff Going On With Their Eyes :
Some babies have wide nasal bridges or large eyelid folds, and this can create the illusion of having crossed eyes. Newborns don't cry tears when they cry - so while they may be screaming, you're not going to see any tears until they're 1-3 months old.
1. The Way Eyes Actually Receive Images :
science, united states of america, united kingdom, canada