Text-book of ophthalmology . in the subsequent course19 290 TEXT-BOOK OF OPHTHALMOLOGY contracts more and more toward the center of the cornea {keratitis centralis annularisof Vossius). Allied to these cases are those in which the central part of the corneabecomes particularly opaque through the confluence of the maculae, which form a whitedisk pretty sharply separated from the less opaque, marginal portions of the cornea. Ihave seen several cases in which this central opacity remained permanently after themarginal portions had cleared up, and formed a dense, white, sharply circumscribedspot i
Text-book of ophthalmology . in the subsequent course19 290 TEXT-BOOK OF OPHTHALMOLOGY contracts more and more toward the center of the cornea {keratitis centralis annularisof Vossius). Allied to these cases are those in which the central part of the corneabecomes particularly opaque through the confluence of the maculae, which form a whitedisk pretty sharply separated from the less opaque, marginal portions of the cornea. Ihave seen several cases in which this central opacity remained permanently after themarginal portions had cleared up, and formed a dense, white, sharply circumscribedspot in the center of each cornea, just as if there had been a deeply penetrating centralulcer. Sometimes the distribution of the infiltration in the cornea is such that the densestopacity occupies the lowest part of the cornea, as if the products of inflammation hadarranged themselves there in obedience to the law of gravitation. In that case theopacity is bounded above by a convex line, or it forms a triangle, the base of which. Fig. 107.—Parenchymatous Keratitis. Magnified patient, a girl of nineteen, had already passed through one attack of parenchymatous kerati-tis six years before. This recurred, the cornea became ectatic, increase of tension set in, and as theresult of this the eye became entirely blind. Since the eye was inflamed and painful all the time, itwas enucleated at the patients own wish. At the time of enucleation, the cornea was densely per-meated with little white spots which were situated in the middle layers of the cornea, and the latterwas consequently so opaque that the iris could not be seen through it. In the preparation, contraryto the usual relations, the cornea is seen to be somewhat thicker in the center than at the edge. Tothese clinically demonstrable white spots correspond small foci, consisting of uninucleated round foci are largest and most numerous in the middle layers of the cornea. At the margin of thecornea are to be seen,
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