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Abstract #19198 Published in IGR 3-1
Effects of early postfiltration ocular hypotony on visual acuity, long-term intraocular pressure control, and posterior segment morphology
Schwenn O; Kersten I; Buckhard Dick H; Müller H; Pfeiffer NJournal of Glaucoma 2001; 10: 85-99
PURPOSE: To determine whether hypotony after filtration surgery has any influence on visual acuity and intraocular pressure (IOP) lowering. PATIENTS AND METHODS: The authors prospectively investigated 43 eyes of 43 patients undergoing trabeculectomy without the use of antimetabolites for 12 months. RESULTS: The lowest postoperative IOP was 4.9 ± 3.6 mmHg (range, 0-14 mmHg). This correlated statistically significantly with the IOP six weeks (p = 0.016), six months (p = 0.009), and one year (p = 0.027) after surgery. Eyes with deterioration of visual acuity six weeks after surgery had undergone stronger postoperative hypotony (correlation with lowest postoperative IOP, p = 0.035). The mean period with an IOP of less than 5 mmHg was 3.5 ± 8.0 days, and the mean period with an IOP of less than 10 mmHg lasted 45.4 ± 68.8 days (range, 0-276 days). A hypotony score based on IOP and duration of hypotony was introduced. A correlation was detected between morphological signs of hypotony, such as tiny retinal folds, at the six-month follow-up, and the duration of hypotony (p = 0.029) and hypotony score (p = 0.001). CONCLUSIONS: Hypotony after filtration surgery may decrease visual acuity in the early postoperative period. Conversely, early postoperative hypotony correlated with better long-term IOP control. There was no deleterious effect on visual acuity after six months.
Dr O. Schwenn, Universitäts-Augenklinik Mainz, Langenbeckstrasse 1, D-55131 Mainz, Germany
Classification:
12.8.11 Complications, endophthalmitis (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
