Light and Sight

What allows you to see objects that do not produce their own light?

• light is absorbed into your eyes.
• light is reflected from the object to your eye.
• light is refracted through the pupil.
• Light is focused through the lens of the eye.

The membrane that protects the eye and through which light is refracted.

• lens
• pupil
• iris
• cornea

Opening in the eye through which light passes.

• iris
• retina
• pupil
• lens

Colored part of the eye, controls size of the pupil.

• lens
• iris
• retina
• cornea

The convex part of the eye, refracts light to focus a real image on the back of the eye.

• retina
• rods
• lens
• iris

The back surface of the eye, light is detected by rods and cones.

• retina
• cornea
• pupil
• lens

The part of the electromagnetic spectrum that can be detected by a person's eyes.

• infrared light
• ultraviolet light
• visible light
• x-ray light

What causes color deficiency?

• One or more types of cones respond to the wrong color
• One of more types of rods respond to the wrong color.
• The iris responds to the wrong color.
• The irises change color.

A person who is nearsighted can see  things up close but not far away, a _________ lens is needed to correct this problem.

• concave
• convex

A person who is farsighted can see far away, but can't see close up, they need a _________ lens to correct this vision problem.

• concave
• convex