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When light levels are low, the pupils of your eyes dilate or open wider to allow more light to enter the eye, enhancing visibility in dim conditions. This response is part of the eye's automatic adjustment mechanism to optimize vision. Additionally, wider open eyes can help gather more light and improve sensitivity to low-light environments, aiding in night vision. This process is controlled by the muscles in the iris, which react to changes in light intensity.
What else can I help you with?
Is reading bad for your eyes?
In poor light conditions and over a prolonged period, it can be.
Why is my hamster's eyes open but still running around?
A hamster usually has it's eyes open when running because it needs to see where it is going. However, it depends on its scent of smell more because they have poor eyesight.
Why do people have red eyes?
Albinos have red eyes due to red retina being visible through the iris as their eyes do not enough pigments to color the eye. Due to a translucent iris and poor absorption of light by retina, light is scattered in the eye exposing the blood vessels underneath. That makes the eyes of an albino to appear red.
You would expect the pupil to be dilated in which circumstances?
It either means you're on drugs or you are attracted to that person
What other animals beside the cat has eyes that glow in the dark?
No animals have eyes that glow in the dark. Some animals, particularly nocturnal predators, have a REFLECTIVE layer behind the retina, to improve their vision in poor light conditions. But these don't glow, they reflect incoming light. No incoming light, no reflection, no glow.
Do spiders like the darkness and why?
Despite their poor eyesight, spiders eyes are sensitive to light. Also, their preferred methods of attack are most effective in the dark.
On my 2003 tiburon When you open the passangers door the interior light does not work nor the door ajar light comes on any help?
either the light is switched off at the light unit or the earth where the switch locates at the door is poor
Why in poor light you cant percieve the true colours of objects?
Our eyes have both black-and-white receptors, and color receptors. The black-and-white receptors work at low light levels; the color recepters require a higher light intensity.
Why the persons with colored eyes have poor vision?
Everybody has colored eyes, usually brown or blue. Poor eyesight can be hereditary or coming from a illness or age.
Do people sometimes open their eyes when they sleep?
Yes. Here's a video showing it... http://video.aol.com/video-detail/daphne-twitching-in-her-sleep-with-eyes-open-pt-1/3708302666 If it's just the third eyelid (the pinkish "haw" that goes from side to side instead of up and down) that is showing, this may be a sign of poor health. When in doubt, ask your vet. Jolo
How do hippos see?
With their eyes. But they have very poor vision.
What light waves that eyes can see?
Humans have three colour receptors in their eyes, and these are active over about half of an octave of frequency. Some insects (e.g. butterflies) have several more colour receptors, and can see over a wider frequency range. Dogs and cats have poor colour vision, for as scavengers, colour has not much evolutionary significance. Birds have very good colour vision, for they must be able to distinguish ripe and unripe fruit. Check the above out in wikipedia under colour vision.
