Effect of myopia on prognosis in treated primary open-angle glaucoma.

Visual field testing of 166 phakic eyes with optic nerve damage from open-angle glaucoma before and after one year of treatment showed that the visual fields of myopic eyes improved more often than those of nonmyopic eyes (12% vs 6%) and worsened less often (6% vs 18%). These results suggested that myopia, which adversely affects the prognosis in ocular hypertension, may facilitate the damaging effects of high intraocular pressure rather than have an independent damaging effect of its own.