Text-book of ophthalmology . cision of the Iris. Magnified 2 X 1. The short rupturewhich is situated in the limbus has now become visible, a a\, the angles of the sphincter which are nowproperly placed. Sometimes very small ruptures occur right in the limbus itself or even in the trans-parent cornea (Figs. 131, ac and ad). In these, owing to the close attachment of theconjunctiva, the latter is necessarily ruptured and the iris almost always prolapses. 344 TEXT-BOOK OF OPHTHALMOLOGY The prognosis of these small ruptures is good, provided the prolapsing iris is occur comparatively
Text-book of ophthalmology . cision of the Iris. Magnified 2 X 1. The short rupturewhich is situated in the limbus has now become visible, a a\, the angles of the sphincter which are nowproperly placed. Sometimes very small ruptures occur right in the limbus itself or even in the trans-parent cornea (Figs. 131, ac and ad). In these, owing to the close attachment of theconjunctiva, the latter is necessarily ruptured and the iris almost always prolapses. 344 TEXT-BOOK OF OPHTHALMOLOGY The prognosis of these small ruptures is good, provided the prolapsing iris is occur comparatively often in young people (even in children), while the moreextensive ruptures occur in the old. Very rarely we meet with incomplete rupture of the sclera. We then find theconjunctiva and sclera ecchymosed and swollen, and a few days after the injury abluish-black line appears near the limbus and concentric with it. This dark area maybecome ectatic later, and increase of tension may set in. There may be displacementof the Fig. 134.—Rupture of the Sclera and Luxation of the Lens Beneath the Conjunctiva. Magnified section through an eyeball which had been injured by a calfs horn. Since seven weekslater symptoms of sympathetic inflammation of the eye set in, the eye was enucleated. The rupturein the sclera lies close to the upper margin of the cornea, not quite one millimetre behind the corneo-scleral junction, so that the lower lip of the wound contains a narrow rim of sclera. The tear in thesclera gapes to the extent of nearly a millimetre, and is filled with a delicate cicatricial tissue, a, whichextends back from this point into the interior of the eye, passing between the ciliary body, c, and theiris, b. The latter at a point corresponding to the scleral rupture is torn off from the ciliary body (iri-dodialysis) and is rolled into a ball just as in Fig. 130. The ciliary t>ody, c, likewise greatly altered, isfound behind the upper edge of the rupture. It
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