. A treatise on the diseases of the eye. ould be applied to diminish the irrita-bility of the eye. 2.—IXFLAMMATION OF THE IRIS. In iritis there are superadded to the symptoms of hypersemia of the iris,those of an effusion of plastic lymph at the edge of the pupil, or on the sur-face and into the stroma of the iris. Formerly, the inflammations of the iris were classified according to thedyscrasi?e of which they were supposed to be pathognomonic, and a formi-dable array of diflerent forms of iritis was in this way established. By chieflybasing our classification on pathological anatomy, we can,
. A treatise on the diseases of the eye. ould be applied to diminish the irrita-bility of the eye. 2.—IXFLAMMATION OF THE IRIS. In iritis there are superadded to the symptoms of hypersemia of the iris,those of an effusion of plastic lymph at the edge of the pupil, or on the sur-face and into the stroma of the iris. Formerly, the inflammations of the iris were classified according to thedyscrasi?e of which they were supposed to be pathognomonic, and a formi-dable array of diflerent forms of iritis was in this way established. By chieflybasing our classification on pathological anatomy, we can, however, greatlysimplify the subject, and so embrace all shades of iritis within the followingfour groups: 1. Simple idiopathic iritis. 2. Serous iritis (Desceraetitis, etc.).3. Parenchymatous iritis. 4. Syphilitic iritis. In order to avoid unnecessary i-epetition, I shall first describe the varioussymptoms which more or less accompany all inflammations of the iris, andthen call attention to those which characterize the special IXFLAMMATIOX OF THE IRIS. 275 Amongst the earliest symptoms of iritis are conjunctival, and especiallysubconjunctival injection, ciliary neuralgia, contraction and sluggishness ofthe pupil, and a discolored, dull, lack-lustre appearance of the iris. There is generally some injection of the conjunctiva, which may be chieflyconfined to the palpebral portion, or extend also to the ocular conjunctivain the vicinity of the cornea. Bat a far more constant symptom is the sub-conjunctival vascularity, giving rise to a more or less broad, rosy zone ofparallel vessels, closely ranged round thecornea. [Fig. 103.] This zone is generally [Fig. 103 of a bright rose color, and consists chiefly ofsmall arterial twigs. It may, however, assumea somewhat blue or brownish tint, and thelatter was formerly erroneously supposed tobe symptomatic of syphilitic iritis. Althoughmarked subconjunctival injection is present inthe great majority of cases of iritis, we occa-s
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