Structure of the Human Eye

Practice vocabulary flashcards identifying and defining the major anatomical structures of the human eye based on the labeled diagram.

Structure of the Human Eye

An anatomical diagram illustrating the main components of the human eye, including the cornea, iris, pupil, lens, retina, choroid, sclera, optic nerve, blind spot, vitreous humor, aqueous humour, and muscle.

Cornea

The clear, protective outer layer at the very front of the eye that covers the iris and pupil.

Aqueous humour

The clear, watery fluid located in the front chamber of the eye between the cornea and the lens.

Iris

The colored, ring-shaped muscular structure behind the cornea that controls the size of the pupil and regulates the amount of light entering the eye.

Pupil

The adjustable central opening in the iris that allows light to pass into the interior of the eyeball.

Lens

The transparent, flexible biconvex structure positioned behind the pupil that focuses light rays onto the retina.

Vitreous humor

The transparent, jelly-like substance that fills the large space between the lens and the retina in the eyeball.

Retina

The light-sensitive sensory layer lining the back of the eye that receives focused light images and converts them into neural signals.

Choroid

The pigmented, vascular middle layer of the eye wall located between the retina and the sclera that provides blood supply and nutrients.

Sclera

The tough, fibrous white outer layer that covers and protects the majority of the eyeball.

Blind spot

The specific area on the retina where the optic nerve exits the eyeball, characterized by an absence of photoreceptor cells.

Optic nerve

The nerve located at the back of the eyeball that transmits visual electrical signals from the retina to the brain.

Muscle

Muscular tissue attached to the eye structure involved in moving the eyeball or focusing the lens.