Do lighter shades of eye colour allow more light into the eye?
441627
People with lighter eye color have problems when light is very bright. ... beaches, snow fields, etc. Darker eyed people have less problems with high intensity light situations. But, all should wear sunglasses that stop UV from entering eye. UV damages nerve endings. Light colored eyes originate from northern climates where there is less light. Dark eyes originated in very intense light areas...close to equator.
327803
my friends used to say my eyes were orange, but they are just light brown as well.  Maybe we are unique and have a new eye colour?
278744
No, our eyes do not throw out light.  You can tell that from the fact that the pupils look black.  The pupil is the hole light goes into; nothing much comes out.  (Occasionally, during an eye exam, does not count.)  \n\nWhat happens is that you get input in both eyes that is slightly different.  You can tell this by looking at an object in the near distance, such as the slat on a vertical blind, and past it to something in the distance, such as the view out the window.  Or hold a pencil at arm's length and view a distant object.  Close one eye and then the other, and you will see that the view in the distance changes relative to the nearer object, because you are getting a different view from your two eyes. But when both eyes are open, the brain puts them together, and interprets the parallax (the difference between the two at different distances) automatically, to give the impression of depth.  It's fortunate it is all unconscious, as otherwise our reaction time would be too slow to drive or otherwise use this ability in real time.
61208
Simplistically, higher frequency light, like UV, would tend to focus closer to the front of the eye. Not on the retina, but somewhere slighty inside the eye in front of the retina. This just means that the UV is slighty ouf of focus - if you could see it.
1095967
It has to do with the way your eye 'sees' light.  The right prescription for eyeglasses can fix that - you can even get contacts with some types of astigmatism.  ;)
36847
You might just have a little more light in one eye than the other or you could be dieing.
193648
because light colored eyes are recessive to dark colored eyes. Dark colors are more dominant and stronger. As with most recessive genes, it is more prone to infirmity and weaknesses.
1119194
Science has shown that we look different based on where we live. Do you no get enough sun light you have pale skin. More sun the darker your skin based on how much vitamin D you need. If you have more sun your eyes would he darker to. Less sun light the lighter your eyes so that you would let more light in for better sight. Also the eyes would form differently based on light. and wind. If the area was bright and or windy then the eyes would not open that much and there fore they are what we now call slanted. \n\nThese are just a  few of our differences and why.
840600
I don't know the answer to your question exactly - it's more a demographics question. But eye color is inherited independent from hair color. There are many genes affecting each, not just one or two.  Dark hair and eye genes are dominant, so they tend to appear together if they were together in the parent (which they often are due to "race"). So it might seem as though dark hair and light eyes together is rare, simply because of incomplete mixing of types in the group you're looking at (assuming there are light-hair-and-eyes types, and dark-hair-and-eyes types to begin with).\n\nThere are some groups of white people in which dark hair and light eyes are common - the so-called "black Irish" come to mind. If they exist, it is because of thorough mixing over time, of light-hair-and-eyes types with dark-hair-and-eyes types.
227705
Yes, the colour of the eyes can change by using contact lenses. I don't know if it can change by a physical way.
806627
This is partially true, partially false.\n\nWith regards to purple, most people would agree that purple light is always some mixture of reddish and bluish light.   I.e. you can imagine two knobs, one raising and lowering the red and the other raising and lowering the blue, and you can get many shades of purple.  There may be other hues added in as well, but there is *always* red and blue (if not, we rarely call it purple).\n\nIn other words, if we didn't have the word "purple" in our language, we would probably call it something like "reddish blue" or "bluish red".\n\nBut we cannot do the same with red and green.   We have a very hard time imagining, or pointing to, a color that is "reddish green".  If given only a red and a green knob, the result will be make the color more or less neutral (gray or white).\n\nLikewise with blue and yellow.  (Some people will respond that green is bluish yellow, but that's because many people are used to mixing pigments on paper ... we're talking about mixing lights.)\n\nThese two pairs,  red-green and blue-yellow, are *fundamental* pairs.  We call them "oppositional".  (There is also a third opponent pair ... light-dark ... but as we're just talking about color here, we can ignore that one for the moment.)  This is called the "opponent theory" of color vision and is associated with Ewald Hering.\n\nSo in that sense we can call these four colors "fundamental" hues"  because all color we see can be mixed using knobs of these four colors.\n\nPeople will also wonder about the red-green-blue primaries, and the fact that we know we have red, green, blue photoreceptors in our eyes.  These would also seem to be fundamental hues (as evidenced by the computer monitor on which you are reading these words ... that monitor is able to simulate a wide range of colors using just red, green, and blue).\n\nThese two theories ... the "opponent theory" and the "trichromatic theory" competed for a long time until we found a way to reconcile them.  Basically, we have three types of photoreceptors, but they are wired in a way in our retina, that by the time signals are travelling down our optic nerve, the red-green are antagonistic signals as are yellow-blue.
49350
Any eye colour other than brown is caused by an absence of pigments in the iris. People inhabiting extreme latitudes usually have lower general pigmentation in order to get sufficient Vitamin D uptake through ultraviolet light. This is accompanied by a tendency to have lighter hair colour and less pigments in the iris.\n\nYou might call it a genetic defect which has proven useful.
9134
I do not beleive such a thing can happen, eye coloration is permanent and cannot be affected by environment, diet or other factors, unless you mean the size of your pupil dilation. Mood do not alter any physical characteristics within the body.
245181
Colour is all about light.  The amount, quality, and colour of light can make a difference.\n\nYour clothing is reflecting light, thats how we see what colour it is, it can easily reflect to your eyes.
1044291
Although your brain generally filters it out, the human eye has a fair amount of chromatic aberration. Blue and violet light in particular tend not to come to a sharp focus, so filtering it out adds to visual acuity. At greater distances, it also helps cut haze, as short wavelengths (blue end of the spectrum) are scattered more than long wavelengths.
745396
Hi there, i don't know how old are you so can't decide on how technical i can be in answering this question. Any way i shall try to be simple.\nThe coloured (black, blue, green or whatever) part of the eye is called the IRIS (not pupil).  It is a shutter that guards the tiny hole in its center(this hole is actually called pupil). \nThe iris prevents too much of light from entering the eyes.It also helps animals and man to see better in darkness. The blackish pigment that colours your iris is MELANIN and its the same colouring agent that gives tan to your skin. Some people have deep melanin pigmentation on their iris and hence they have blackish iris. in some people, the amount of this pigment is a bit low, hence, their eyes seem brown. When the amount of colour is much lower, the eyes appear more bluish yellowish or greenish.\nIts actually the total absence of melanin that makes some eyes look blue or green. \nok, then thats all....\nGood bye!
133907
No, there's loads of different shades/colours of eyes. Mine seem to change from light blue to green to dark blue