Senses

A clear fluid that helps the cornea keep its rounded shape

• aqueous humor

• blind spot

• cones

• cornea

The place where all nerves from the retina join to form the optic nerve. Each eye has a _____ _____ where there are no light-sensitive cells

• aqueous humor

• blind spot

• cones

• cornea

A tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through the _______ The cornea begins bending light to make an image; the lens finishes the job.

• aqueous humor

• blind spot

• cones

• cornea

A muscle that controls how much light enters the eye. It is suspended between the cornea and the lens. Human ________ come in many colors, including brown, blue, green, and gray.

• iris

• lens

• myelin

• optic nerve

A clear flexible structure that makes an image on the eye’s retina. The _____ is flexible so that it can change shape, focusing on objects that are close up and objects that are far away.

• iris

• lens

• myelin

• optic nerve

The bundle of nerve fibers that carry information from the retina to the brain.

• iris

• lens

• myelin

• optic nerve

The _________ is the dark circle in the center of your iris. It’s a hole that lets light into the inner eye.

• pupil

• retina

• rods

• sclera

The layer of light-sensitive cells at the back of the eye. The _________ detects images focused by the cornea and the lens. The __________ is connected to the brain by the optic nerve.

• pupil

• retina

• rods

• sclera

The thick, tough, white outer covering of the eyeball.

• pupil

• retina

• rods

• sclera

The colorful, shiny material located behind the retina. Found in animals with good night vision, the ________ reflects light back through the retina.

• tapetum

• vitreous humor