Human Eye Anatomy

cameras

Eyes are very similar to ____. Like ____, eyes take pictures of the world around you

sensory nervous system

The human eye is a sense organ and a part of the _____

sclera

The ____, or white part of the eye, protects the eyeball

sclera

It covers the entire outside of your eyeball, except the cornea

choroid

The ____ is the vascular layer of the eye, lying between the retina and the sclera

choroid

It contains blood vessels that nourish the retina

pupil

This is a sort of hole in the middle of your iris or black dot at the center of the eye, which is an opening though which light can enter the eye

pupil

Size of the _____ decreases or increases depending upon the intensity of light entering the eye

decreases, increases

The size of pupil _____ in high-intensity light and _____in low-intensity light

Iris

This is the colored part of you eye that controls or regulates the amount of light that enters the eye

cornea

The ____ is the clear layer at the front of your eye, which covers the iris and the pupil

cornea

It transmits and focuses light into the eye to make sure your eye records clear images

lens

A ____ is located behind the pupil, acts like a camera that focuses light rays onto the retina

lens

It can become thicker or thinner to make the picture as clear as possible

thicker, thinner

Lens become _____ for close objects and ____ for far away objects

lens

It is made up of a transparent jelly like substance, which is made up of proteins

retina

The ___ is the sensory membrane, lying at the back of your eye.

retina

It is composed of several layers of cells called photoreceptor

rods and cones

Two types of photoreceptor cells in the human eye:

rods, cones

____ process black and white, and ____ process colors

rods and cones

These cells turn images into electrical impulses that sent to the brain through the optic nerve

optic nerve

The electrical impulses formed by the retina travel along the ____ to the brain

optic nerve

The ____ is a path that connects the eye and the brain

vitreous body

_____ is a clear, jelly-like substance that fills the space between the lens and the retina. It helps preserve the eye’s shape