[Pseudoexfoliation syndrome and phacoemulsification: comparative study with a control population]

Abstract

Purpose: To determine the outcomes in cataract surgery by phacoemulsification in eyes with pseudoexfoliation syndrome (PEX) compared with eyes without this syndrome and to analyze the clinical features of pseudoexfoliation syndrome.

Patients and methods: A retrospective, single-center comparative study was conducted on patients who underwent cataract surgery between January 2006 and December 2008. Demographic parameters (age, sex, ethnicity, medical and ophthalmologic history), clinical features (visual acuity, pupil dilatation, intraocular pressure) before and after surgery, and surgery complications were analyzed and compared to a control group without PEX.

Results: One hundred and four eyes of 81 patients were included in the study. The eyes were divided into two groups: 52 eyes with pseudoexfoliation syndrome (PEX) and 52 eyes without pseudoexfoliation (control group). The rate of surgical complications was not statistically different between the pseudoexfoliation and control groups. The mean preoperative and postoperative visual acuity were not statistically different between the two groups. The mean postoperative visual acuity was LogMAR 0,06 + or - 0,2 in the pseudoexfoliation group and LogMAR 0,03 + or - 0,06 in the control group. The mean follow-up was 1,4 + or - 1,3 months in the pseudoexfoliation group and 1 month in the control group. Pseudoexfoliation was bilateral in 72 % of cases. Open-angle glaucoma or ocular hypertension was associated in 21 cases (40 %) in the pseudoexfoliation group versus no open-angle glaucoma and five cases of ocular hypertension in the control group (10 %). Poor pupil dilatation was observed in 25 cases (48 %) in the pseudoexfoliation group and in two cases (4 %) in the control group. Phacoemulsification with IOL was the surgical technique in all the cases, with only one case of anterior chamber IOL in the pseudoexfoliation group.

Discussion: Cataract surgery in PEX is known to be associated with more complications during surgery. Poor pupil dilatation is one of the most common problems in cataract surgery in eyes with PEX. Nevertheless, the cataract surgery in eyes with PEX syndrome is not associated with a higher rate of surgical complications in our study. However, PEX required optimized surgery. Pseudoexfoliation syndrome is most common in its bilateral presentation. It is associated with chronic secondary open-angle glaucoma. The best visual acuity after surgery was similar in the two groups, but PEX required more time to attain this maximal visual acuity. Coronary heart disease could occur more frequently in patients with PEX compared with subjects without PEX.

Conclusion: Pseudoexfoliation syndrome did not confer a statistically higher risk for surgical complications in eyes without marked phacodonesis or lens subluxation. Pseudoexfoliation syndrome did confer a higher risk for glaucoma and coronary ischemia.