Your eyes simply take in more light in order to cope with less available light. Thats why when you look in a mirror after you turn a light on your pupils start to shrink.
The pupil is allways black. The iris is the colored part.
dilating
The pupil is the black center part of the eye.
The pupil is the opening in the center of the iris (the colored part of the eye) that allows light to enter the eye. By dilating or constricting, the pupil controls the amount of light reaching the retina at the back of the eye.
The pupil of the eye can be likened to a camera aperture. Just as an aperture controls the amount of light entering a camera, the pupil regulates the amount of light entering the eye.
There is one pupil in each eye. The pupil is the opening in the center of the iris that allows light to enter the eye. Its size can change depending on the lighting conditions to regulate the amount of light entering the eye.
Pupil is a window for the light to enter our eyes. When we are in a dim light a nerve impulse is generated to the brain to enlarge the pupil. Size of pupil is managed by the iris (coloured part of the eye). If excessive light is there, the pupil shrinks to a smaller size so that the eye's not damaged esp. the retina where the image of objects are formed
Prozac can dilate the pupil of the eye.
It is actually called "The Eye"!
The pupil dilates when stimulated by the pinching on the nape of the neck.
The dark hole in the center of your eye is called the pupil. It is an opening that allows light to enter the eye and reach the retina at the back of the eye. The size of the pupil can change in response to varying levels of light.
There are many ways to compare the shape of the pupil in a dissected eye with our own pupil. One is to examine general diameter.