Ophthalmology Grand Rounds
Samuel Masket, MD
Ophthalmology Stein Eye Institute
UCLA Geffen School of Medicine
Dysphotopsia represents undesired optical imagery associated with otherwise uncomplicated cataract surgery. There are 3 basic forms, Positive (PD), Negative (ND) and Diffractive (DD) types, each with their own etiologies. All 3 types may exist in the same patient. PD is attributed to the square edge of the optic and Index of Refraction of the optic, whereas ND is more related to position of the optic in relationship to the lens capsule bag. DD is purely associated with the diffractive rings on the surface of the optic. The literature supporting these concepts will be explored. Unlike PD, ND has central nervous system manifestations that will also be presented and considered. Non-surgical means for treating Dysphotopsia are limited; however surgical approaches have a high degree of success and will be discussed.