젊은 환자에서 장기간의 클로나제팜 복용 후 발생한 백내장 1예

A Case of Cataract after Long-Term Use of Clonazepam in a Young Patient

Purpose: To report a case of cataract after long-term use of clonazepam in a young patient, with a similar appearance to cataract induced by other psychotropic agents. Case summary: A 37-year-old woman complained of a visual disturbance in both eyes. The best-corrected visual acuity was 0.8 in the right eye and 0.6 in the left eye. Bilateral cortical cataract was observed on slit-lamp examination, and no other ophthalmic abnormalities were found. Potential risk factors for cataract were investigated, including past medical and family history, revealing a 20-year history of oral clonazepam (0.5-1 mg/day), for the neurological diagnosis of “chorea of unknown etiology”. Detailed medication history did not reveal long-term use of any other drugs which could have induced the cataract. Conclusions: Because clonazepam use may induce cortical cataract, regular ophthalmologic examinations are necessary during long-term oral psychotropic therapy. J Korean Ophthalmol Soc 2011;52(12):1541-1544