Why do eyes show red in a photograph vs green or blue etc..?
156248
The light from the flash bounces off the back of the eye, unimpeded by the pigment.
730209
mine did that but red. it's something to do with files being on different harddrives i think!!
197523
Everyone sees everything a little differently than others.  As for colours, it's how your eyes may process light and how your brain may interpret that light.  \n\nIf you're seeing blue while I see red or vise-versa, there's a big problem because those two colors are opposites (actually red and cyan, which is kinda blue).
67475
Our eyes react to different shades of light, and what we determine as colors\nare different wavelengths of light.  When we say an object is a certain\ncolor, it is because it is reflecting more of a certain wavelength light.\nFor example red objects reflect "red" light, or light with a longer\nwavelength (lower frequency) better than other types of light.\n\nSo, we determine the color by the primary type of light the object reflects\n(or emits if it is a light).\n\nWe also perceive other properties of colors, and that is lightness or\ndarkness.  A light colored object may reflect one color especially well, but\nalso reflect other colors as well.  A very light green object, for example,\nreflects green very well, but also reflects most other colors, just not as\nwell.\n\nDark objects tend not to reflect light very well at all, even if it reflects\none color better than the other.\n\nWhite objects, tend to reflect all types of light equally well, and tend to\nreflect most of the light cast on it.\n\n\n\nBlack absorbs-white reflects, that is why.
855724
Nearly all of the fires that we see are red, both because we rarely see anything heated to very high temperatures and because of the properties of carbon and its molecules. Meanwhile, the molecular properties of water make it bluish-green. Since these are the hot/cold things we most often see, our minds probably associate hot and cold with them.\n\nOur bodies might also bias us toward thinking red is hot and blue is cold. When we get warm, more blood flows to our skin in an effort to cool us. The result is that our skin looks red. If we are cold, the body tries to conserve heat by shunting blood away from our skin, giving out skin a bluish tinge.
17833
To elaborate on the previous response: Color is merely your brain's interpretation of light (electromagnetic radiation in the visible spectrum) entering your eye. A difference in color corresponds to a difference in the light's wavelength. And just as there are an infinity of numbers between 0 and 1 (fractions), you could also technically say there are an infinite number of colors between the shortest wavelength of visible light and the longest. This is the answer you'd get from a physicist.\n\nBut, a physiologist/neurologist might have a different answer. As I stated, color is an interpretation of the chemical reaction between light and the rods and cones in the back of your eye. The fact that it's an interpretation and the fact that we can't detect very small differences in wavelength suggests that there is a much smaller set of colors that we, as humans, could define given our very limited built-in equipment (our eyes). Even among humans it varies though, I have no idea what my girlfriend is talking about sometimes. It's not for lack of trying, my eyes/brain (as with many guys) is capable of detecting a smaller set of colors than girls. Is her set more valid than mine?\n \nAnd I'm sure an artist and a poet would tell you something completely different :)
871649
That is a very interesting question.\nno . . . . but there is one exception\nIn a camera flash, the light is reaching through the pigmentation\nto the retina, the light-sensitive membrane covering the back wall of the eyeball, which is the color red.\nthe only organisms that have eyes visibly red are ones that are albino\nalbino organisms have less melon(color) in there skin, hair, and eyes.\nresulting in the clear vision to their retina, which causes their eyes to be the color red.\n(i.e. white mice that have red eyes)
617424
Basically, it's filmed at two slightly different angles, then one is shaded red, ther other blue. Then you watch it with those shaded glasses so each eye filters out the other image. The two different angles behave like your eyes, and hence give the 3D effect.
700451
Different photoreceptors respond more or less strongly to different wavelengths (colours) of light. Digital cameras use more than one type of photodector for each pixel of the picture. By comparing the strengths of the signals from different detectors you can tell what colour the pixel should be.\n\nFilm cameras do the same thing, but use different chemicals in the film instead of photodectors. The different chemicals respond to different wavelengths of light.
985345
Its something to do with the eyes I think. Sorry I cant give any further info.
406406
Your genetics determine eye color.  The iris (colored part) of your eye has pigments in it to protect it from the sun, kind of like your skin does.  Blue eyes=not a lot of pigment....brown eyes=lots of pigment.  Albino people don't have any pigment there, so they tend to have pink eyes that are very sun-sensitive.
658101
the right lens is green colour, and the left lens is blue colour. \nthe reason behind this is to let people identify the lenses easily. the word "right" has 5 letters, same as the word "green".\n\nthe word "left" has 4 letters, same as the word "blue"\n\nso the right lens is green and the left lens is blue\ni am an optometrist it is definitely correct.
111886
Your question is "Why are some people eyes whiter than others?"\nThe answer: Cos some people take care of them much better than others, or are not stressing them that much in comparison to the red eyed ones.\nIt cud also be genetic.
992392
There IS no guarantee. In fact, it has been proven that people DON'T all see color exactly the same way. But it doesn't really matter, because there's no way to communicate how I see red to someone else, even if they see my perception of red as yellow.
316761
There are different kinds of color blindness.  The most common is red/green.  This occurs when the chromosome that codes for how we see color is missing either the red or green gene or else there is a chimeric gene (it has both red and green on the same gene) that only allows one of the colors to be expressed. If the chromosome doesn't have both the red and green gene being properly expressed than the person will be red/green color blind.  This means that he/she will not be able to perceive red (if that is the gene missing) or green (if that is the missing gene) There are no drugs that can help this, because you are missing the gene -- there is no way to "fix" that.  Hope that helps.  :)
1173968
It is correct that the visible wavelengths of electromagnetic radiation  are from 400nm (violet) to 700nm (red); but that is because of the way the eye perceives light, and has nothing to do with the way waves interact with each other.  Also, because of the way the eye sees color (and not due to the nature of the waves) many colors can be produced either by a  single wavelength of a combination of two or more wavelengths.  For additive color reproduction three primaries are selected (red, blue and green) because they produce the widest range of other colors (gamut), probably because of the way the eye works.  Other primaries can be used, but they will result in a more limited range; also more primaries can be added to increase gamut.  How selected primaries are combined to create other colors is shown in the "CIE color chart".
4286
Same reason humans have red eye -> Flash light that is sent directly to the retina (parallel to eye level) is reflected off the blood vessels at the back of the retina, hence the red color.\n\nPerhaps you see it more in dogs and cats because they reflect more light off their retina, thats how they manage to have better eye sight than humans.