Ultrasound biomicroscopy of capsular delamination (true exfoliation) of the crystalline lens.

An 86-year-old woman came to our emergency ward, and the impression was acute-angle-closure glaucoma attack with corneal edema of the left eye. Incidentally, we found a diaphanous membrane in the anterior chamber, and it was confirmed to be capsular delamination (true exfoliation) of the crystalline lens using ultrasound biomicroscopy. Capsular delamination of the lens can easily be missed because it is transparent and very thin. It is more difficult to find this membrane if the cornea is not sufficiently clear. Ultrasound biomicroscopy at 50 MHz produces good resolution of the fine diaphanous capsular split membrane. Ultrasound biomicroscopy is an effective method for investigating these difficult cases.