The incidence of cystoid mascular edema following intracapsular or extracapsular cataract extraction with implantation of a Binkhorst 4-loop lens is reported. The results, showing an incidence of macular edema of 13% after intracapsular operation and 2.1% after extracapsular operation, correlate well with reports published elsewhere. Most of the cases were recognized at the earliest three months after operation. A correlation with intraocular pressure was found. Examples of fluoresceinangiographic findings are presented.