Light and Eyes

What part of the eye controls how much light enters the black hole (pupil) in the center of the eye?

• optic nerve
• pupil
• cornea
• iris

The two parts of the eye that refract light are the ______________.

• eyelid and eyebrow
• eyelid and lens
• cornea and retina
• cornea and lens

A person who is farsighted can be assisted by_________________.

• lenses that are tinted lenses
• concave lenses that make light rays focus on the cornea
• convex lenses that make light rays converge farther toward the retina
• surgery that enlarges the pupil

What part of the eye acts like a convex lens?

• pupil
• retina
• cornea
• eyelid

For clear vision, an image must be focused exactly on the ________________.

• retina
• pupil
• optic nerve
• lens

What is the order of the path of light in the human eye?

• cornea, pupil, lens, retina, optic nerve, brain
•  lens,cornea, pupil, retina, optic nerve, brain
• pupil, lens, retina, optic nerve, cornea, brain
• brain, pupil, lens, retina, optic nerve, cornea,

A ___ lens makes objects appear bigger.

• concave
• convex
• prism
• flat

A __ lens makes objects appear smaller and further away.

• convex
• concave
• prism
• flat

What type of lens is wider in the middle than on the edges?

• Concave

• Convex

• Objective

• Ocular

What type of lens is thinner in the middle than at the edges?

• Convex

• Concave

• Objective

• Magnifying