Intraocular pressure 2 1/2 years after extracapsular cataract extraction and sulcus implantation of posterior chamber intraocular lens.

The intraocular pressure in 50 eyes of 50 patients was measured 2 1/2 years after planned extracapsular cataract extraction with intended implantation of a posterior chamber lens in the ciliary sulcus. The results were compared to the preoperative values, and the pressure observed after 4 months. Although a significant elevation was found from the fourth month (P = 0.015), the intraocular pressure at 2 1/2 years was found to be significantly lower than the preoperative value (P = 0.002). No significant difference was found in two subgroups in which transillumination defects in the iris or pigment in the lower anterior chamber angle was present.