Direct Reflection
Direct reflection—also known as specular reflection—is the mirror-like reflection of a light from a surface in which the light from a single incoming direction is reflected in a single outgoing direction.
entrance pupil
The entrance pupil is the image of the lens’ aperture stop as seen from the front of the lens — through the glass elements in front of the iris — and that is normally where the iris is located.
Entrance Pupil Lenses
The entrance pupil is the apparent aperture as seen from the object side.
Pupil Reflex
Eye doctors use three tests to assess pupil reflexes: the light response test, the swinging flashlight test, and the near response test.
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).
