The hydropathic encyclopedia : a system of hydropathy and hygiene in eight parts ..designed as a guide to families and students, and a text-book for physicians . of the capsule of the lens. 15. Theneurilemma of the optic nerve. 16. The arteria centralis retinas, imbedded in the centreof the optic nerve. Middle Coat.—The second tunic is formed of the choroid, ciliarijligament, iris, and ciliary processes. The choroid is a vascular mem-brane, of a rich brown color externally, and of a deep black on itsinner surface. Posteriorly it has an opening for the passage of theoptic nerve ; it is connecte
The hydropathic encyclopedia : a system of hydropathy and hygiene in eight parts ..designed as a guide to families and students, and a text-book for physicians . of the capsule of the lens. 15. Theneurilemma of the optic nerve. 16. The arteria centralis retinas, imbedded in the centreof the optic nerve. Middle Coat.—The second tunic is formed of the choroid, ciliarijligament, iris, and ciliary processes. The choroid is a vascular mem-brane, of a rich brown color externally, and of a deep black on itsinner surface. Posteriorly it has an opening for the passage of theoptic nerve ; it is connected anteriorly with the iris, ciliary processes,and with the junction of the sclerotic and cornea, by a dense whitestructure, calleJ the ciliary ligament, which surrounds the circum-ference of tho iris, liV^ a rin^ The choroid membrane is composed 192 ANATOMY. oftnree layers, the external being principally an arrangement of veius,called vcnte vorticosre. The middle layer is formed by the ramificationof minute arteries. The internal layer is a delicate cellular structure,containing the pigmenlum nigrum, or coloring matter of its posteriorsurface. Fig. DISSECTION OF THE EYEBALL. Fig. 9S is a dissection of the eye-ball, showing its second tunic, andthe mode of the distribution of thevenffi vorticosjs of the Arnold. 1. Part of the sole-rotic coat. 2. The optic 3. The choroid coot. 4. Theciliary ligament. 5. The iris. 66. The vunas vorticostB. 7 7. Thetrunks of the vensa vortieosss atthe point where they have piercedthe sclerotica. 8 8. The posteriorciliary veins, which enter the eye-ball in company with the posteriorciliary arteries, by piercing thesclerotic at 9. 10. One of thelong ciliary nerves, accompaniedby a long ciliary vein. The ciliary ligament formsa circle round the iris, connecting the cornea and sclerotic at theirjunction with the iris and external membrane of the choroid. The iris, or rainbow, is so denominated from its variety of colors ind
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