. A treatise on the diseases of the eye. In fact, the two affections are alike in character, and de-[Fig. 81. mand a very similar mode of treatment. As in phlyctenular conjunctivitis, the ap-pearance of the vesicles on the cornea isgenerally preceded by a sensation of heatand itching in the eyelids, which is soonfollowed by conjunctival and subconjunctivalinjection, photophobia, lachrymation, andciliary neuralgia. The latter, which is oftenbut slight when the affection is confined tothe conjunctiva, is frequently very severe inherpes cornefe. The same is the case withthe photophobia, which is
. A treatise on the diseases of the eye. In fact, the two affections are alike in character, and de-[Fig. 81. mand a very similar mode of treatment. As in phlyctenular conjunctivitis, the ap-pearance of the vesicles on the cornea isgenerally preceded by a sensation of heatand itching in the eyelids, which is soonfollowed by conjunctival and subconjunctivalinjection, photophobia, lachrymation, andciliary neuralgia. The latter, which is oftenbut slight when the affection is confined tothe conjunctiva, is frequently very severe inherpes cornefe. The same is the case withthe photophobia, which is often most intenseand persistent. The characteristic little phlyc-tenulse soon make their appearance on theAfter T. W. Jones.] Surface of the cornea. [Fig. 81.] Their number and mode of distribution vary , there are but one or two near the margin of the cornea, in othercases they are more numerous, and are either scattered freely over the surfaceof the cornea, or are chiefly confined to one part. Or again, they may be. PHLYCTENULAR KERATITIS. 213 ranged along its edge in single file, surrounding a more or less considerableportion of the cornea, like a string of beads. If the phlyctenulse arenumerous, and extend over a considerable exjDanse of the cornea (pannusscrofulosus), the vascularity is general, and the cornea is surrounded by abright, rosy zone of vessels; whereas, if the pustules are confined to oneportion of the cornea, the injection is generally also partial. Sometimes,the phlyctenules are veiy superficial, and appear in the form of small, trans-parent vesicles or blisters, whose epithelial covering is soon shed, leaving asmall excoriation, which may easily escape detection, and lead to an erro-neous diagnosis and mode of treatment. Generally, however, the phlyc-tenula is more apparent, and is embedded in the cornea, its summit risingslightly above the surface. It appears in the form of a small, circumscribed,gray infiltration, surrounded by a zone of
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