Ch. 4 Sec 2 Vision

What is the primary function of the human eye?

• Hearing

• Vision

• Taste

• Smell

Why does the eye register nothing at the blind spot?

• It has extra photoreceptors

• It lacks photoreceptors

• It is too bright

• It is too dark

Rods are sensitive only to ______.

• Color

• Brightness

• Movement

• Shape

Rods are more sensitive to light than ______.

• Cones

• Lenses

• Pupils

• Retinas

Adaptation to bright light happens much more quickly than adaptation to the dark. True or False?

• True

• False

What is used to measure visual acuity?

• Glasses

• Eye charts

• Contact lenses

• Magnifying glass

The ability to see in low light improves for up to 45 minutes. True or False?

• True

• False

In the human eye, light travels through the pupil to the lens and is then reflected onto the ____.

• Iris

• Retina

• Cornea

• Optic nerve

The cones in the retina are primarily responsible for ____.

• Low light vision

• Color vision

• Focusing light

• Sending signals to the brain

The retina is located at the ____.

• Front of the eye

• Back of the eye

• Middle of the eye

• Side of the eye