Pupil vs. Cornea

Pupilnoun

A learner under the supervision of a teacher or professor.

Pupilnoun

An orphan who is a minor and under the protection of the state.

Pupilnoun

(anatomy) The hole in the middle of the iris of the eye, through which light passes to be focused on the retina.

Pupilnoun

(zoology) The central dark part of an ocellated spot.

Pupilnoun

The aperture in the iris; the sight, apple, or black of the eye. See the Note under Eye, and Iris.

Pupilnoun

A youth or scholar of either sex under the care of an instructor or tutor.

Pupilnoun

A person under a guardian; a ward.

Pupilnoun

A boy or a girl under the age of puberty, that is, under fourteen if a male, and under twelve if a female.

Pupilnoun

a learner who is enrolled in an educational institution

Pupilnoun

contractile aperture in the iris of the eye

Pupilnoun

a young person attending school (up through senior high school)

Pupil

The pupil is a black hole located in the center of the iris of the eye that allows light to strike the retina. It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil.

Corneanoun

(anatomy) The transparent layer making up the outermost front part of the eye, covering the iris, pupil, and anterior chamber.

Corneanoun

The transparent part of the coat of the eyeball which covers the iris and pupil and admits light to the interior. See Eye.

Corneanoun

transparent anterior portion of the outer covering of the eye; it covers the lens and iris and is continuous with the sclera

Cornea

The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. The cornea, with the anterior chamber and lens, refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power.