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Vision

Vision

Author: Nathan Lampson
Description:

This lesson will examine the structure of the eye and will identify how our brain processes visual signals.

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Tutorial
Terms to Know
Aqueous Humor

Fluid within the eyeball that maintains pressure and transmits light.

Cone Cells

A photoreceptor that detects bright light.

Cornea

A layer that covers the iris and helps to focus light into the eye.

Fovea

An area of the retina where vision is the most acute.

Iris

The colored portion of the eye.

Lens

A structure in the eye that focuses light to the retina.

Optic Nerve

A nerve that sends impulses to the visual cortex in the brain where images are interpreted.

Photoreceptors

Cells that detect light found on the basement layer of the retina; includes rods and cones.

Pupil

The black part of the eye through which light enters.

Retina

An area in the back of the eye that contains photoreceptors to absorb light.

Rod Cells

A photoreceptor that detects dim light.

Sclera

The white of the eye that aids in protection.

Vision

The perception of light, images and movement by the eye.

Visual Cortex

The part of the brain that receives nerve impulses from the optic nerve.

Vitreous Humor

Fluid within the eyeball that supports the lens and the eyeball.