Henry Gray (1825–1861). Anatomy of the Human Body. 1918.
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FIG. 877– Diagram of the blood vessels of the eye, as seen in a horizontal section. (Leber, after Stöhr.). Course of vasa centralia retinæ: a. Arteria. a. 1 Vena centralis retinæ. B. Anastomosis with vessels of outer coats. C. Anastomosis with branches of short posterior ciliary arteries. D. Anastomosis with chorioideal vessels. Course of vasa ciliar. postic. brev.: I. Arteriæ, and I1. Venæ ciliar. postic. brev. II. Episcleral artery. II1. Episcleral vein. III. Capillaries of lamina choriocapillaris. Course of vasa ciliar. postic. long.: 1. a. ciliar. post. longa. 2. Circulus iridis major cut across. 3. Branches to ciliary body. 4. Branches to iris. Course of vasa ciliar. ant.: a. Arteria. a1. Vena ciliar. ant. b. Junction with the circulus iridis major. c. Junction with lamina choriocapill. d. Arterial, and d1. Venous episcleral branches. e. Arterial, and e1. Venous branches to conjunctiva scleræ. f. Arterial, and f1. Venous branches to corneal border. V. Vena vorticosa. S. Transverse section of sinus venosus scleræ. (See enlarged image) |
The Iris.—The iris has received its name from its various colors in different individuals. It is a thin, circular, contractile disk, suspended in the aqueous humor between the cornea and lens, and perforated a little to the nasal side of its center by a circular aperture, the pupil. By its periphery it is continuous with the ciliary body, and is also connected with the posterior elastic lamina of the cornea by means of the pectinate ligament; its surfaces are flattened, and look forward and backward, the anterior toward the cornea, the posterior toward the ciliary processes and lens. The iris divides the space between the lens and the cornea into an anterior and a posterior chamber. The anterior chamber of the eye is bounded in front by the posterior surface of the cornea; behind by the front of the iris and the central part of the lens. The posterior chamber is a narrow chink |