Understanding Optical Illusions and Human Vision

What do many optical illusions exploit to trick the brain?

• Olfactory cues

• Tactile sensations

• Auditory signals

• Patterns of light or perspective

What physiological feature of human vision do some illusions take advantage of?

• Taste buds

• Afterimages

• Smell detection

• Auditory processing

What percentage of all sensory receptors in the body are located in the eyes?

• 70%

• 90%

• 30%

• 50%

What does the frequency of a light wave determine?

• Its temperature

• Its speed

• Its amplitude

• Its hue

What is the condition called when the eyeballs pop out from their sockets?

• Optic neuritis

• Hyperopia

• Globe luxation

• Myopia

What part of the eye is responsible for focusing light onto the retina?

• The sclera

• The iris

• The lens

• The cornea

What are the two types of photoreceptor cells in the retina?

• Rods and cones

• Bipolar and ganglion cells

• Iris and pupil

• Sclera and cornea

What do cones detect?

• Fine detail and color

• General shapes and light intensity

• Sound waves

• Pressure changes

Why do we see an afterimage of different colors when looking at a white screen after staring at a flag?

• Because of a change in light intensity

• Because of the sound illusion

• Because our cones get tired

• Because of a change in pressure

What is the role of the optic nerve?

• Carries impulses to the brain

• Controls the pupil size

• Filters light wavelengths

• Produces tears