The student's guide to diseases of the eye . Fig. 89.—Section of very deep glaucoma cup, (Compare Fig. 35.) cup. This cup, when deep, has an overhanging edge,because the border of the disc is smaller at the levelof the choroid than at the level of the lamina cri-brosa ; its sides are quite steep even when the cup isshallow (Fig. 91). With the ophthalmoscope this cupping is shownby a sudden bending of the vessels just within the 16 242 GLAUCOMA border of the disc, where they look darker becauseforeshortened (Fig. 90); if the cup be deep they may. FIG. 90.—Ophthalmoscopic appearance of slight cu
The student's guide to diseases of the eye . Fig. 89.—Section of very deep glaucoma cup, (Compare Fig. 35.) cup. This cup, when deep, has an overhanging edge,because the border of the disc is smaller at the levelof the choroid than at the level of the lamina cri-brosa ; its sides are quite steep even when the cup isshallow (Fig. 91). With the ophthalmoscope this cupping is shownby a sudden bending of the vessels just within the 16 242 GLAUCOMA border of the disc, where they look darker becauseforeshortened (Fig. 90); if the cup be deep they may. FIG. 90.—Ophthalmoscopic appearance of slight cupping of the disc in glaucoma. The disc is surrounded by a narrow, irregular, zone of atrophied choroid. (Wecker and Jaeger.) x 7. disappear beneath its edge to reappear on its floor, where they have a lighter shade (Pig. 92). lne
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