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Optic disc topography before and after trabeculectomy in advanced glaucoma



Optic disc topography before and after trabeculectomy in advanced glaucoma



Ophthalmic Surgery and Lasers 27(5): 349-354



To analyze changes in the optic disc topography after filtration surgery. Laser scanning tomography was performed in 10 eyes of 9 patients (mean age 65.6 +/- 8.1 years; age range 55 to 75 years) after a mean follow-up of 3.7 months, and in 8 eyes of 7 patients (mean age 63.1 +/- 7.6 years; age range 55 to 75 years) after a mean follow-up of 13.1 months. Preoperatively, the mean intraocular pressure (IOP) was 24.4 +/- 6.9 mm Hg with maximal medication. Postoperatively at 3.7 months it was 11.0 +/- 2.2 mm Hg, and at l2.1 months it was l3.6 +/- 2.8 mm Hg. An initial reduction in IOP of more than 30 percent at 3.7 months was achieved without medication in all but 1 eye. After 12.1 months, an IOP reduction of more than 30 percent was achieved in 6 of 8 eyes (1 with medication), while 2 eyes had IOP reductions of less than 15 percent (< or = 3 mm Hg) despite medication. In the 6 eyes, the optic disc cup volume showed a decrease of more than 30 percent, while the 2 eyes without marked IOP reductions had slight increases in cup volume. Of the 2 eyes without marked decreases in cup size, 1 had normal-tension glaucoma and 1 experienced an increase in IOP of more than 25 mm Hg during the first postoperative week. The postoperative IOP should be kept low enough to permit reversal of optic disc changes.

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Accession: 046870678

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PMID: 8860600


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