* Normally, each illuminated pupil promptly becomes constricted. The opposite pupil also constricts consensually. * When ocular disease, such as cataract, impairs vision, the pupils respond normally. * When the optic nerve is damaged, the sensory (afferent) stimulus sent to the midbrain is reduced. The pupil, responding less vigorously, dilates from its prior constricted state when the<unk>  is moved away from the unaffected eye and towards the affected eye. This response is a relative afferent pupillary defect (or Marcus Gunn pupil).
Swinging light test
Lamellar body count
Farnsworth–Munsell 100 hue test
Prism cover test
Humphrey visual field analyser
Schick test
Holtzman inkblot technique
Watson–Schwartz test