Visual hallucinations immediately after macular photocoagulation.

ABSTRACT

PURPOSE: To evaluate the incidence of visual hallucinations after macular photocoagulation for choroidal neovascularization. METHODS: After macular photocoagulation for choroidal neovascularization, 60 consecutive patients were asked to respond to an orally administered questionnaire. RESULTS: Twenty-seven patients (45%) described photopsias, flashing lights of various colors. Ten additional patients (16.6%) also described structured hallucinations, including known or unknown faces, flowers, and geometric patterns, which occurred hours or a few days after photocoagulation. Patients with structured hallucinations were older (P =.04) and more often had subfoveal choroidal neovascularization (P =.005) and severe macular disease in both eyes or at least in the treated eye (P =.01). CONCLUSIONS: Visual hallucinations appear to be a frequent, albeit unrecognized, side effect of macular photocoagulation of choroidal neovascularization. The provision of proper information to patients may avoid concern about a psychiatric origin of their hallucinations.