The Two Muscles in the ________ Dilate and Contract the ________

question 143

Multiple Choice

The two muscles in the ________ dilate and contract the ________, thus regulating the amount of light entering the eye.

• A) fovea; retina
• B) iris; pupil
• C) pupil; lens
• D) cornea; lens

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Definitions:

Distinguish Hues

The ability to perceive and differentiate colors, often associated with the visual processing of varying wavelengths of light.

Brightness

A measure of how light or luminous a space or source appears to the eye.

Intensity of Nonspectral Color

The degree of strength or vividness of a color that does not correspond to a single wavelength of light but is perceived as a mixture of wavelengths.

McCullough After-effect

A phenomenon where prolonged viewing of colored stimuli causes an object to appear in complementary colors when subsequently viewed on a white background.