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Foveal sensitivities were measured after onset of adapting background fields for each of the following four groups of subjects aged 40-70 years: (1) low-tension glaucoma subjects with minimal field loss in the test eye, (2) primary open-angle glaucoma subjects with minimal field loss in the test eye, (3) normal control subjects, and (4) subjects originally(More)
A series of 52 patients with scotomas attributed to tobacco smoking, alcohol consumption, and nutritional deficits--alone and in combination--was reviewed. Whether use of tobacco alone can produce a scotoma has been a controversial point; our series suggests that it can. Central and cecocentral scotomas did occur in association with smoking alone; there(More)
PURPOSE To test the hypothesis that extracellular matrix turnover, mediated by the matrix metalloproteinases, modulates aqueous humor outflow facility in a human outflow model. METHODS Matrix metalloproteinase activity was manipulated and outflow facility evaluated using perfused human anterior segment organ culture. Purified matrix metalloproteinases,(More)
Extracellular matrix (ECM) turnover and remodeling are initiated, at least in part, by the regulated secretion of members of a family of matrix metalloproteinases. Human and bovine trabecular mesh-work in culture secrete interstitial collagenase, both the 72- and the 92-kD forms of type IV collagenase (gelatinases) and stromelysin, and the tissue inhibitor(More)
PURPOSE The regulation of the trabecular meshwork's extracellular matrix is poorly understood and may involve a family of secreted proteinases, the matrix metalloproteinases. Because the trabecular extracellular matrix has been hypothesized to affect intraocular pressure, an evaluation was made of the ability of two cellular modulators to change the levels(More)
PURPOSE The mechanism by which laser trabeculoplasty reduces elevated intraocular pressure in primary open-angle glaucoma has been established. To test the hypothesis that trabecular extracellular matrix turnover is involved, stromelysin expression after laser treatment of anterior segment organ cultures was evaluated. METHODS Argon laser trabeculoplasty,(More)
PURPOSE Laser trabeculoplasty of the anterior uveal region of the trabecular meshwork induces sustained matrix metafloproteinase expression within the juxtacanalicular region of the meshwork. Studies were conducted to test the hypothesis that a factor mediates this response and to identify the factor. METHODS Human anterior segment organ cultures were(More)
Flicker sensitivities were measured for more than 100 people age 60 and older with stimulus-conditions originally designed to obtain estimates of preretinal absorption by the lens and macular pigment. Flicker sensitivities were measured on two chromatic backgrounds: a 1000-td, 480-nm background and a 5800-td, Wratten 33 background (approximately metameric(More)
Human corneoscleral explants were maintained for several weeks in defined, serum-free media. Trabecular cell vitality, as judged by vital stain exclusion, is high for at least one month. Trabecular ultrastructure, as compared to that of fresh eyes, first shows minor cellular and extracellular matrix degradation after 3 weeks in culture. The biosynthetic(More)
PURPOSE. Primary open-angle glaucoma (POAG) is a complex disease with a genetic architecture that can be simplified through the investigation of individual traits underlying disease risk. It has been well studied in twin models, and this study was undertaken to investigate the heritability of some of these key endophenotypes in extended pedigrees. METHODS.(More)