Abstract
To the Editor. —The Macular Photocoagulation Study (MPS) Group recently reported the results of a randomized clinical trial comparing krypton red laser photocoagulation with no treatment for choroidal neovascular lesions involving the foveal avascular zone in patients with age-related macular degeneration. 1 Although a thorough review of the literature was not the purpose of the report, earlier work by Yassur et al 2 had bearing on the MPS results and should have been cited. Their results from a randomized trial involving 123 eyes with age-related macular degeneration and neovascular lesions involving the foveal avascular zone showed that 37 (67% ) of 55 untreated eyes had deterioration in visual acuity in comparison with only 22 (32% ) of 68 eyes treated with krypton laser. The MPS results for similar eyes showed that 98 (58% ) of 169 untreated eyes in comparison with 86 (49% ) of 174 treated eyes had severe visual loss (six or
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