Ring Melanoma

AT is a 26-year-old man who was noted to have a pigmented lesion of his right iris on examination 2 years previously. UBM had been performed on his initial visit and was consistent with an iris nevus of the temporal iris (Fig. 327). He was instructed to return for follow-up in 6 months but came back 2 years later when he noted increased iris pigmentation. At this time slit-lamp examination demonstrated pigmentary deposition in the angle from the 4:00 meridian around to 12:30. Some pigmented cells were noted in the anterior chamber. His intraocular pressure in that eye was 26 mm versus 17 mm in his left eye.