AbstractThe efficacy of topical 1% apraclonidine in controlling early postoperative IOP rise after cataract extraction was evaluated. Topical 1% apraclonidine was applied to 20 patients who underwent extracapsular cataract extraction with posterior intraocular lens implantation. On another 20 patients, who acted as control group a placebo (artificial tears) was given. The IOP was measured before preoperative medication and postoperatively at 6, 12 and 24 h, using the Perkins hand‐held applanation tonometer. In the control group, 9 patients (45%) developed intraocular hypertension and in the treated group only 2 (10%) showed hypertension, but with short duration and a moderate IOP rise. The difference in frequency of intraocular hypertension between the groups was statistically significant (p<0.02). The statistical analysis showed that the postoperative IOP of operated treated eyes was significantly smaller than the IOP of operated control eyes. Furthermore, the postoperative IOP and the initial IOP did not differ statistically. The results of this study demonstrate the efficacy of topical apraclonidine 1% in controlling the early and transient intraocular hypertension following cataract extractio