Page:Plates illustrating the natural and morbid changes of the human eye.djvu/26

20 others they appear unequally dilated. The brownish and the black spots near the optic disc, and in other parts of the figure, represent accumulations of pigment in and upon the choroid.

(The optic disc, as regards colour, indistinctness of outline, and scarcity of blood-vessels, resembles very much in appearance the one observed in the patient from whom Fig. 10 was taken. Vision of the eye, from which Fig. 11 was taken, was very defective, and some portions of the retina were much more sensitive than others. The patient, among other symptoms characteristic of inherited syphilis, had had syphilitic corneitis in both eyes. In the right eye the deeper parts (choroid, retina, &c.) had completely escaped inflammation.

Fig. 12.

Inflammation of a portion of the choroid, retina, and vitreous substance, in the region of the yellow spot. (The figure has been by mistake printed upside down.)

The grey-white and opaque portion, occupying nearly half of the figure, appears ill-defined, and shades oif into the transparent retina, and into the normal " red " choroid. The opaque portion represents the "inflamed " choroid and retina.

A few patches of capillary vessels, some minute blood spots, and many unequally dilated large vessels, are distributed over the inflamed portion. The vessels of the retina near it are much larger and tortuous. Grey-white and opaque flocculi are visible in the vitreous chamber adjoining the focus of inflammation.

PLATE VII. Fig. 13. Hyperæmia of the optic disc and of the retina, with inflammation of portions of the choroid, retina, and vitreous substance in the region of the yellow spot. The greater part of the region of the yellow spot is represented in Plate VI. Eig. 12..

The optic disc occupying the middle of the figure appears nearly as red as the adjoining choroid. The veins of the retina are tortuous