Text-book of ophthalmology . s were situated, and iritis is added to the other a regular keratitis profunda develops (page 299). It takes alonger time for the opacities to disappear, nor is it always the case that theydisappear completely. The insensiti veness of the cornea to touch is especiallypronounced in herpes zoster. Reduction of the intra-ocular tension notinfrequently exists so long as the inflammation is still recent; in other casesincrease of tension sets in. The prognosis of this variety of herpes, fromwhat has just been said, is less favorable than that of herpe
Text-book of ophthalmology . s were situated, and iritis is added to the other a regular keratitis profunda develops (page 299). It takes alonger time for the opacities to disappear, nor is it always the case that theydisappear completely. The insensiti veness of the cornea to touch is especiallypronounced in herpes zoster. Reduction of the intra-ocular tension notinfrequently exists so long as the inflammation is still recent; in other casesincrease of tension sets in. The prognosis of this variety of herpes, fromwhat has just been said, is less favorable than that of herpes febrilis; thetreatment is the same. [Iontophoresis with quinine is serviceable, particularly in reducing the pain(McNab).—D.] 229. (c) Keratitis Vesiculosa (et Bullosa).—This variety occurs in eyesthe cornea of which is more or less clouded and insensitive; in eyes with alarge corneal cicatrix, or eyes which have been rendered blind by iridocyc-litis or by increase of tension. In such, with the accompaniment of violent. Fig. 105.—Keratitis Bullosa. Magnified 92 X small vesicles of herpes corneas are produced by detachment of the epithelium alone fromBowmans membrane, and since the corneal epithelium is quite delicate, are very evanescent. On theother hand, the larger bulla? in keratitis bullosa form in cornese which have been already diseased andin which there has been a new growth of fibrous connective tissue between the epithelium and Bow-mans membrane. This connective tissue is detached together with the epithelium by fluid and givesgreater stability to the anterior wall of the bulla. The above figure is taken from an eye renderedblind by irido-cyclitis. Bowmans membrane, b, covering the stroma of the cornea, S, is stained darkbecause it is filled with lime granules corresponding to the zonular opacity of the cornea which is present(page 310). The epithelium, E, is detached over the area of half a millimetre. At the highest pointof the bulla it is thin, and on
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