PSY 430 In-class Activity L5

Approximately what portion of the cerebral cortex is devoted to vision?

• ~50%

• ~30%

• ~10%

• ~60%

Which of the following choices most accurately reflects the missing step in the steps of perception:

Energy in world -> Receptor -> Sensory N. -> _____ -> Primary Cortex -> Association Cortex

• Thalamus
• Pons

• Retina

• Basal Ganglia

Light enters the eye through the _____.

• Iris

• Sclera

• Pupil

• Retina

Most refraction in the eye occurs when light rays travel through the _____.

• Cornea

• Iris

• Lens

• Retina

T/F The size of the pupil is regulated by the iris.

• True

• False

What is the clear gel substance in your eye?

• ciliary muscles

• presbyopia

• vitreous humor

• sclera

"Floaters" in your eye's vitreous humor are a buildup of what?

• Foreign bodies (i.e., dust, dirt, etc.)

• Lipids

• Proteins

How is an image projected onto the retina?

• upright

• upside down

• backwards

• at an angle

The optic nerve is formed by _____.

• ganglion cell axons

• Ciliary muscles

• optic radiation

• vitreous humor

The optic chiasm is the _____.

• place where visual fields overlap

• place where the two optic nerves meet

• reason for our depth perception

• place where photoreceptors respond to light