June 2008

 

CATARACT/ IOL

 

Patients with pre-op IOP experience pressure reduction during phaco


   

Stratifying eyes according to intraocular pressure (IOP) before performing phacoemulsification showed greater long-term IOP reductions than previously reported in normotensive and ocular hypertensive eyes with intraocular lens (IOL).

In the retrospective review conducted by Brooks J. Poley, M.D., Hilton Head, S.C., and his colleagues, the researchers divided 588 eyes that had had phacoemulsification with IOL implantation into five groups based on IOP at surgery, patient age at surgery, years of post-op follow-up, and a comparison between IOP at one year and at the final check.

The five groups are patients with pre-op IOP from 9 to 14 mmHg (Group A, n=198); 15-17 mmHg (Group B, n=223); 18-19 mmHg (Group C, n=86); 20-22 mmHg (Group D, n=62); and 23-31 mmHg (Group E, n=19).

According to the results, which are published in the May issue of the Journal of Cataract & Refractive Surgery, the final mean IOP reduction was 6.5 mmHg (27%) in Group E; 4.8 mmHg (22%) in Group D; 2.5 mmHg (14%) in Group C; and 1.6 mmHg (9%) in Group B. In Group A, the mean IOP at the final examination was 0.2 mmHg higher (0.1% increase).

Dr. Poley noted in the study that the IOP reduction was proportional to the pre-op IOP. The decrease was greatest in eyes with the highest pre-op IOP; whereas the IOP remained unchanged in eyes with the lowest pre-op IOP. He noted that the IOP reductions at one year were sustained over 10 years and were similar in patients of all ages.

Therefore, stratifying eyes according to pre-op IOP helped the surgeons predict post-op IOP in normotensive and ocular hypertensive eyes.

Reported by: EyeWorld News Service

Patients with pre-op IOP experience pressure reduction during phaco Patients with pre-op IOP experience pressure reduction during phaco
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