منابع مشابه
Peripheral ring opacity of the cornea.
(i) A 59-year-old Caucasian male presented at the casualty department complaining of pricking in the right eye. Symptoms were caused by a marginal infiltrate and this resolved on conventional therapy. A recurrence one month later also responded well. Each cornea presented an arcus senilis and, in the zone ofstroma affected by the arcus, an additional opacity could be seen. This was identical in...
متن کاملThe Bovine Cornea Opacity and Permeability Test
An in vitro test for the development of corneal opacity in response ocular irritants was first proposed by Muir (1984). This test required the clamping of a bovine cornea between two chambers filled with physiologic saline and measuring the transmittance of white light through the cornea using the voltage output of a photocell. This was followed by exposure of the epithelial surface of the corn...
متن کاملBilateral, anterior stromal ring opacity of the cornea.
AIMS/BACKGROUND To describe a bilateral, mid peripheral, ring-shaped corneal opacity, not resembling any known corneal degeneration, dystrophy, or other disorder, and occurring without ocular or systemic disease. METHODS Ophthalmic examination, haematological screening, and ultrasound biomicroscopy. RESULTS A 25 year old man showed grey-white, granular opacities in both corneas, with an 8 m...
متن کاملBilateral central anterior stromal opacity of the cornea: dystrophy or degeneration?
PURPOSE To describe a bilateral, central, oval corneal opacity not resembling any known corneal degeneration or dystrophy. METHODS Ophthalmic examination, corneal topography, and pachymetry. RESULTS A 30-year-old woman presented complaining of blurred vision. Biomicroscopic examination revealed bilateral, centrally located, oval, diffuse opacification of the anterior corneal stroma. Corneal...
متن کاملThe Opacity of Glass Rethinking Transparency in Contemporary Architecture
In this paper, an exchange of letters between the philosopher Jacques Derrida and architect Peter Eisenman is used as a catalyst to discuss the material qualities of glass and its relationship with the concept of transparency in architecture. In his criticism of an architecture devoid of human qualities, Derrida uses glass, defined through Walter Benjamin’s writings, as a hard and cold material...
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ژورنال
عنوان ژورنال: Journal of the American Medical Association
سال: 1908
ISSN: 0002-9955
DOI: 10.1001/jama.1908.25410030042001i