Negative Dysphotopsia: Defining and quantifying negative dysphotopsia and characterization and causative factors of negative dysphotopsia

Negative dysphotopsia describes an optical phenomenon occurring after uneventful, modern cataract surgery. Its hallmark is a sickle shaped shadow usually in the far peripheral, temporal visual field recognized by the patient. Purpose of the study is to identify causative factors for negative dysphotopsia. Further, this exploratory study will try to find associations between patient complaints of negative dysphotopsia, ocular biometry and psychophysical test results.