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Cataract removal improves SITA-standard mean deviation, study finds

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Cataract surgery significantly improved SITA-standard mean deviations in patients with coexisting cataract and open-angle glaucoma, a retrospective study found. However, cataract extraction did not affect patients' pattern standard deviations, the study authors said.

M. A. Rehman Siddiqui, MRCOphth, MRCS(Ed), MSc, of the University of Aberdeen, Scotland, and colleagues evaluated the effect of cataract extraction on SITA perimetry in 37 patients with coexisting open-angle glaucoma. All patients had SITA-standard 24-2 visual fields both pre- and postoperatively.

At 4.1 months mean follow-up, mean visual acuity had significantly improved from 0.41 to 0.88. The SITA-standard mean deviation also significantly improved, from -12.3 to -11.1, although patients had no significant change in mean pattern standard deviation (PSD), according to the study.

"SITA-standard PSD can be used to monitor glaucoma progression in patients with coexisting glaucoma and cataract," the authors said.

The study is published in the March issue of the Journal of Glaucoma.