The process by which one's pupils adapt to a dimly lit or dark environment, eventually reaching the size they are most likely to be while performing normal activities at that lighting level.

The dark-adapted pupil diameter, which is a critical part of pre-operative testing for refractive surgery, cannot be accurately measured unless a rational protocol for dark adaptation is followed.

dark-adapted pupil diameter

pupil

The Lone Dog: Accurate pupil measurement in laser vision correction

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