Prospective randomized comparison of one- versus two-site Phacotrabeculectomy two-year results.

Purpose: Previous studies have failed to find a significant difference in intraocular pressure (IOP) between one- and two-site phacotrabeculectomy. A possible explanation has been relatively small samples and short follow-up. We prospectively observed 80 patients for 2 years randomized to one- versus two-site phacotrabeculectomy with the primary outcome measure being IOP.