2006-06-15 19:59:22 · 10 answers · asked by purpledevilfish 1 in Arts & Humanities ➔ Visual Arts ➔ Photography
The red color comes from light that reflects off of the retinas in our eyes. In many animals, including dogs, cats and deer, the retina has a special reflective layer called the tapetum lucidum that acts almost like a mirror at the backs of their eyes. If you shine a flashlight or headlights into their eyes at night, their eyes shine back with bright, white light.
Humans don't have this tapetum lucidum layer in their retinas. If you shine a flashlight in a person's eyes at night, you don't see any sort of reflection. The flash on a camera is bright enough, however, to cause a reflection off of the retina -- what you see is the red color from the blood vessels nourishing the eye.
2006-06-15 20:04:05 · answer #1 · answered by Muddy 5 · 0⤊ 1⤋
The eye has a layer of shiny blood vessels toward the back of the eye near the retina. The retina thus is red because of the blood. The light enters the eye and reflects from the retina (not before being color changes...like shining a flashlight onto a red mirror).
2006-06-15 20:03:35 · answer #2 · answered by King of Kings 2 · 0⤊ 0⤋
Red eye is caused by the flash illuminating the blood vessels of the retina at the back of the eye. Cameras sometimes use a double flash to help eliminate red eye - the first flash causes the iris to contract so not as much light can hit the retina. The second flash takes the picture.
Peace,
Radical Geezer
2006-06-15 20:04:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Wanna know the funny thing about this question...
Is that every answer you get will not be 100% accurate. There are tons of theories as to what causes red eys (light reflecting off of retinas, blood vessels get temp enlarged, retina is absorbing the other colors, etc) but there is no proven fact to what causes it.
For every answer, I can think of a scenario that counterdicts it and proves it wrong. Unfortunately it's something all people deal with. But as you get better, you know how to minimize the possibility of it happening to you.
2006-06-16 09:07:28 · answer #4 · answered by Ipshwitz 5 · 0⤊ 0⤋
Children and animals have "red eye" in photos because all children, like animals, are wild (albeit extremely loveable) beasts ;) .
2006-06-15 20:44:58 · answer #5 · answered by Princess Toadstoolie 3 · 0⤊ 0⤋
Trust me, red eye is not limited to children and animals.
2006-06-15 20:03:55 · answer #6 · answered by freedomnow1950 5 · 0⤊ 0⤋
It's the light reflecting in their corneas. Any good photo shop can get it out.
2006-06-15 20:02:43 · answer #7 · answered by Fat Guy 5 · 0⤊ 0⤋
drugs
2006-06-15 20:02:59 · answer #8 · answered by happymrzot 6 · 0⤊ 0⤋
you know you can prevent that? when i take pics that doesn't happen to me.
2006-06-15 20:02:58 · answer #9 · answered by Girly♥ 7 · 0⤊ 0⤋
Maybe they are albinos.
2006-06-15 20:02:43 · answer #10 · answered by Scozbo 5 · 0⤊ 0⤋