Text-book of ophthalmology . OF THE CHORIOID 475 the increased pressure in the subretinal space; they flatten themselves upon each otherand often include only a narrow Y-shaped furrow between them. There are, it is true,serous detachments which also show this appearance. These are those rare cases inwhich serous detachment is associated with increase of tension. Such cases are notdistinguishable from tumor of the chorioid and might, in analogy with pseudo-glioma(see page 420) be called pseudo-sarcoma. To make the right diagnosis in such cases wemay call in the aid of transillumination (see pag
Text-book of ophthalmology . OF THE CHORIOID 475 the increased pressure in the subretinal space; they flatten themselves upon each otherand often include only a narrow Y-shaped furrow between them. There are, it is true,serous detachments which also show this appearance. These are those rare cases inwhich serous detachment is associated with increase of tension. Such cases are notdistinguishable from tumor of the chorioid and might, in analogy with pseudo-glioma(see page 420) be called pseudo-sarcoma. To make the right diagnosis in such cases wemay call in the aid of transillumination (see page 94). Or we may employ is made with a fine needle, which is plunged deep in through the sclera at thespot where the tumor is thought to be. If the needle enters a tumor, it is not freelymovable, as would be the case if its point lay in the vitreous or in subretinal fluid. Ifin spite of these diagnostic aids we are still in doubt, enucleation of the eye, which wouldbe blind anyhow, is unconditionally Fig. 208.—Sarcoma Chorioide^e Diffusum. Vertical Section Through the Right Eye. The patient, who was fifty-four years old, had been blind in this eye for years from an opacity in thecornea. The eye became inflamed from time to time and half a year previous had begun to take ona black color. On the patients admission the eye was found to be enlarged in all its parts and thecornea was covered by a granular brownish-black deposit which only at the nasal and lower side lefta narrow marginal portion of the cornea free. In the section made through the eye we see that thelatter as a whole is elongated and tapers off into a somewhat oval extremity behind—two signs ofhigh myopia, which was also present in the patients other eye. The cornea is covered with a flat darkpseudoplasm which, at the upper side, o, is continued on to the adjoining sclera, but at the lower side,u, still leaves some part of the cornea free. The cornea beneath the tumor is scarcely altered
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