marcus gunn pupil การใช้

• A Marcus Gunn pupil is seen, among other conditions, in optic neuritis.
• A Marcus Gunn pupil is distinguished from a total CN II lesion, in which the affected eye perceives " no " light.
• Papillitis can be differentiated from papilledema by an afferent pupillary defect ( Marcus Gunn pupil ), by its greater effect in decreasing visual acuity and color vision, and by the presence of a central scotoma.
• "' Relative afferent pupillary defect "'( "'RAPD "') or "'Marcus Gunn pupil "'is a medical sign observed during the swinging-flashlight test whereupon the patient's pupils constrict less ( therefore appearing to dilate ) when a bright light is swung from the unaffected eye to the affected eye.