Understanding the Eye and Vision

What is the primary function of the cornea in the eye?

• To control the size of the pupil

• To protect the eye from damage

• To carry impulses to the brain

• To transmit and bend light into the eye

How does the iris respond in a dim environment?

• It makes the pupil smaller

• It does not change the pupil size

• It makes the pupil larger

• It closes the pupil completely

What role do ciliary muscles play in vision?

• They transmit light to the retina

• They protect the eye

• They control the size of the pupil

• They adjust the shape of the lens

Where is the image formed in the eye?

• On the cornea

• On the iris

• On the retina

• On the sclera

What is the function of the sclera?

• To transmit light

• To focus light onto the retina

• To protect the eye

• To control the lens shape

How does the convex lens in the eye affect light?

• It absorbs light

• It refracts and focuses light

• It blocks light

• It reflects light

What happens to the image formed on the retina?

• It is projected directly to the brain

• It is transmitted as a virtual image

• It is flipped upside down by the brain

• It is absorbed by the sclera

How is a real image different from a virtual image?

• A real image is formed in mirrors

• A real image is always right-side up

• A real image is formed by actual light rays hitting a surface

• A real image cannot be projected on a screen

What is similar between a pinhole camera and the human eye?

• Both have a convex lens

• Both have an iris

• Both form an upside-down image

• Both form a virtual image

What allows the eye to see objects at varying distances?

• The cornea

• The sclera

• The convex lens

• The optic nerve