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Vitrectomy performed for traction yields anatomic improvement

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WAILEA, Hawaii — When traction was the primary reason for vitrectomy in a cohort of patients, mean visual acuity changed little between baseline and 6 months, a study presented here showed.

Julia A. Haller

There was, however, marked anatomic improvement in central subfield thickness from a mean of 500 µm to approximately 300 µm, Julia A. Haller, MD, said at the American Society of Retina Specialists annual meeting.

Of 241 eyes enrolled in the study designed by the Diabetic Retinopathy Clinical Research Network, 35 met the primary cohort criteria.

Patients were accepted in the cohort if they had visual acuity of between 20/63 and 20/400, central subfield thickness greater than 300 µm and no cataract extraction during vitrectomy. Visual acuity improved by 10 letters or more in 37% of patients, but 23% of patients lost 10 or more letters.

Vitrectomy was performed by the surgeon's choice, which was a limitation of the study, Dr. Haller said. The study will continue for another year.