Anatomy Eye Flashcards
Retina
A layer of photoreceptors cells and glial cells within the eye that captures incoming photons and transmits them along neuronal pathways as both electrical and chemical signals for the brain to perceive a visual picture.
Layer of sensitive cells at the back of the eye; light is focused on the retina and is then transmitted to the optic nerve, which leads to the brain.
Optic Nerve
An extension of the central nervous system.
Transmits electrical impulses from the eyes to the brain, brain processes this sensory information so that you can see.
Sclera
Functions as the supporting wall of the eyeball. White outer coat of the eyeball.
Helps maintain eyeball shape and protects it from injury.
Covered by conjunctiva (clear mucus membranes that lubricate the eye).
Muscles attached to the sclera help move the eyeball up and down and side to side.
Vitreous Humor
Provides nutrients to your eye and helps your eye keep its shape. It sticks to your retina at the back of your eye and lets light in.
Iris
A circular muscle with a hole in the middle, the iris contracts and expands to control the amount of light that gets into the pupil.
Pupil
Lets light into the eye as the muscles of the iris change chape.
Lens in the eye focuses light that passes through the pupil.
Lens
Transmit light, focusing it on the retina.
Cornea
Outermost, clear layer of the eye, immediately anterior to the anterior chamber, iris, and pupil.
Involved in the refraction of light entering the human eye.
Conjunctiva
A thin clear membrane that protects the eye.
Covers the inside of the eyelid and the white of the eye (sclera).
Creates mucus layer that forms part of the tears.
Eye
Detect light and converts it to impulses, regulates its intensity and focuses it to form an image and transmits it to the brain.
