Human Eye and Vision Quiz

Which part of the eye is responsible for protecting the eye from accidents and foreign particles?

• Iris

• Lens

• Pupil

• Cornea

What is the function of the iris in the eye?

• To analyze the information received

• To focus light onto the retina

• To control the amount of light entering the eye

• To convert light into electrical impulses

Which type of photoreceptors in the retina are sensitive to dim light and interpret impulses as black and white?

• Iris

• Cornea

• Rods

• Cones

What is the main function of the optic nerve in the eye?

• To focus light onto the retina

• To convert light into electrical impulses

• To send impulses to the brain

• To control the amount of light entering the eye

What happens to the iris muscles in bright light?

• They send impulses to the brain

• They make the pupil smaller

• They change the shape of the lens

• They open the pupil wider

What is the main aim of wearing glasses, contact lenses, or correcting vision with surgery?

• To focus the light onto the retina

• To convert light into electrical impulses

• To control the amount of light entering the eye

• To analyze the information received

Which part of the eye is responsible for allowing adjustment of the size of the pupil opening?

• Lens

• Cornea

• Pupil

• Iris

What is the function of the lens in the eye?

• To convert light into electrical impulses

• To control the amount of light entering the eye

• To focus light onto the retina

• To change the shape of the pupil

What type of photoreceptors in the retina are sensitive to bright light and allow you to see details and colors?

• Rods

• Cones

• Cornea

• Iris

What happens to the iris muscles in dim light?

• They send impulses to the brain

• They change the shape of the lens

• They make the pupil smaller

• They open the pupil wider