dilating
Miosis
response
A homograph for "pupil" is "pupil," which can also refer to the small, dark hole in the center of the eye.
The pupil is allways black. The iris is the colored part.
The small opening of the iris in the eye is the pupil.
the pupil focuses the light from the source to the eye and the darker it is, the more it has to focus.
The pupil is the black center part of the eye.
The pupil is a hole that allows light into the eye.
The iris controls the amount of light that is entering the pupil. When its dark out, the sphincter muscles on the iris ease to dilate the pupil, but when its light out, the sphincter muscles contract to constrict the opening of the pupil.
At night, the pupil dilates to let in more light. Astigmatism is a distortion in the cornea that causes different focal lengths for light passing through different parts of the cornea into the lens. With a small aperture (constricted pupil), the differences do not cause noticeable blurring; just as in a camera, a small aperture gives greater depth of field. At night, when the aperture is larger (dilated pupil), the eye has less depth of field, so the imprecise focal length of the eye causes the image to be noticeably blurred.
Pupil is to eye as nostril is to nose
it squishes it until it becomes so small that the naked eye can't see it. (he he he) (naked)
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.
An Argyll Robertson pupil is a bilateral small pupil of the eye which reduces in size when the patient focuses on a near object but does not constrict when exposed to bright light - a sign of neurosyphilis.