Optical Illusions Quiz

What is the purpose of optical illusions?

• To entertain and make political statements

• To trick the physiology of human vision

• To create ghost effects or afterimages

• To exploit the disconnect between sensation and perception

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

• 90%

• 70%

• 50%

• 30%

Which sense is considered the dominant sense of humans?

• Hearing

• Taste

• Smell

• Vision

What determines the hue of a light wave?

• Amplitude

• Intensity

• Wavelength

• Frequency

What part of the eye allows light to travel into the eye?

• Iris

• Cornea

• Retina

• Lens

Which type of photoreceptor detects fine detail and color?

• Bipolar cells

• Cones

• Rods

• Ganglion neurons

What happens to the cones when you stare at a brightly colored image for too long?

• They get tired and stop responding

• They become more sensitive to color

• They become more sensitive to light

• They start firing action potentials

What is the purpose of the outer accessories of the eye?

• To protect the eyeballs

• To enhance vision

• To regulate light intake

• To produce tears

What is the function of the posterior choroid?

• To supply blood to the retina

• To protect the lens

• To transmit nerve impulses

• To control the size of the pupil

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

• All of the above

• The rods register a grayscale image

• The blue and green cones get tired

• The red cones are the only ones responding