In the first series of experiments, preretinal oxygen tensions were measured using microelectrodes in newborn kittens, at 6 +/- 2 days of age, following their placement in an atmosphere of 80 to 90% oxygen for 5 +/- 1 day. The oxygen exposure caused an obliteration of the normally developing retinal vasculature. Preretinal oxygen tensions in the resultant avascular retina were close to zero whi...

A retrospective study of the histopathological features of retinitis pigmentosa was undertaken. A consistent finding in 10 out of 10 eyes from 6 patients with retinitis pigmentosa was the presence of a preretinal membrane. The frequency of this finding has not been noted previously. Preretinal gliosis may well be responsible for the production of the abnormal glinting fundus reflex seen at the ...

A retrospective study of the histopathological features of retinitis pigmentosa was undertaken. A consistent finding in 10 out of 10 eyes from 6 patients with retinitis pigmentosa was the presence of a preretinal membrane. The frequency of this finding has not been noted previously. Preretinal gliosis may well be responsible for the production of the abnormal glinting fundus reflex seen at the ...

PURPOSE. Light microscopic and ultrastructural studies were perfomed in the human epiretinal membranes secondary to proliferative vitreoretinopathy (PVR).HETRODS.Humanpreretinal membranes from 5 eyes with PVR were obtained by vitrectomy. These membranes were processed for inmunohistochemical (GFAP) and electron microscopy studies to study the morphology and the cell composition. RESULTS. Light ...

PURPOSE. Light microscopic and ultrastructural studies were perfomed in the human epiretinal membranes secondary to proliferative vitreoretinopathy (PVR).HETRODS.Humanpreretinal membranes from 5 eyes with PVR were obtained by vitrectomy. These membranes were processed for inmunohistochemical (GFAP) and electron microscopy studies to study the morphology and the cell composition. RESULTS. Light ...

In experimental retinal detachment of the owl monkey we observed the formation of preretinal and subretinal membranes which had cellular connections to the retina proper. Based on light microscopic findings we concluded that retinal cells grow out of the retina and build up the preretinal and subretinal tissue. Electron microscopically these cells are identified as astrocytes which grow out thr...

Although progressive retinal neovascularization is a potentially blinding complication of several diseases, there are no good animal models. The authors developed a consistent model of preretinal neovascularization in the rabbit by partially digesting the posterior vitreous with repeated injection and aspiration of 1 IU of hyaluronidase before injection of 250,000 homologous dermal fibroblasts....

PURPOSE To report a first case of Terson-like syndrome associated with asphyxiophilic practices in an adolescent. METHODS A 12-year-old boy was referred for decreased visual acuity in his right eye. His father had been diagnosed 3 weeks before with subarachnoidal hemorrhage. Fundus examination showed a dense preretinal hemorrhage in the right eye suggestive of Terson syndrome. RESULTS Angio...