Which of the following is the conditional instruction that controls the MCR zone? 
Definitions:
Brightness
A perception of how luminous an object appears; often influenced by the relative intensity of light it emits or reflects.
Hue
The dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth.
Accommodation
The cognitive process of adjusting one's understanding to incorporate new information.
Cornea
The transparent front part of the eye that covers the iris, pupil, and anterior chamber, contributing to the eye's optical power.
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