Spatial Frequency
Spatial frequency describes the rate that a stimulus changes across space.
Spatial Distance Frequency Relation
Spatial frequency is the frequency of change per unit distance across an image. Some images have high spatial frequencies, whereas other ones have low spatial frequency.
Retinoscopy2
Retinoscopy (also called skiascopy) is a technique to objectively determine the refractive error of the eye (farsighted, nearsighted, astigmatism) and the need for glasses.
Retinoscopy
Retinoscopy (also called skiascopy) is a technique to objectively determine the refractive error of the eye (farsighted, nearsighted, astigmatism) and the need for glasses.
Relative Afferent Pupillary Defect
Relative Afferent Pupillary Defect (RAPD) is a condition in which pupils respond differently to light stimuli shone in one eye at a time due to unilateral or asymmetrical disease of the retina or optic nerve (only optic nerve disease occurs in front of the lateral geniculate body).
Pupil Reflex
Eye doctors use three tests to assess pupil reflexes: the light response test, the swinging flashlight test, and the near response test.
