Text-book of ophthalmology . nced than in simple hyperaemia,and the clear-cut markings upon the anterior surface of the iris are is easy to understand that the rigid and swollen iris should react butinsufficiently to light; the pupil is greatly contracted. into the surrounding cavities, the an-terior and posterior chambers, and isaccordingly characterized by varyingsymptoms: 398 TEXT-BOOK OF OPHTHALMOLOGY 338. (2) Exudation into the anterior chamber manifests itself first byturbidity of the aqueous, in which numerous exudation cells are turbidity is best recognized up
Text-book of ophthalmology . nced than in simple hyperaemia,and the clear-cut markings upon the anterior surface of the iris are is easy to understand that the rigid and swollen iris should react butinsufficiently to light; the pupil is greatly contracted. into the surrounding cavities, the an-terior and posterior chambers, and isaccordingly characterized by varyingsymptoms: 398 TEXT-BOOK OF OPHTHALMOLOGY 338. (2) Exudation into the anterior chamber manifests itself first byturbidity of the aqueous, in which numerous exudation cells are turbidity is best recognized upon the dark background of the pupil,which in this case looks gray instead of being a pure black. Gradually theformed constituents floating in the aqueous sink to the bottom of thechamber, where they produce a hypopyon (Fig. 98, A and B). Whenthere is very great hyperemia, rupture of the blood-vessels in the iris maytake place with an extravasation of blood, which also sinks to the bottomof the anterior chamber (hyphsema). e-. Fig. 165.—Recent Iritis with Pupillary Membrane. Magnified 55 X iris, i, is greatly thickened by swelling and infiltrated by numerous round cells. Attachedto the pupillary margin is an exudate, e, which fills the whole pupil, and which, on the one hand, pushesits way somewhat beneath the pigment layer, p, and, on the other hand, extends up on the anteriorsurface of the iris. That it is a quite recent exudate is evident from its thickness and from its beingcomposed of a network of fibrin, inclosing scattered pus corpuscles. The number of the latter increasestoward the surface of the iris, k, capsule of the lens.
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