. Advanced lessons in practical physiology for students of medicine. Physiology. LESSON XXXIX THE SENSE ORGANS (Continued) VISION 1. Dissection of the Eye.—Procure an ox eye. Having itlontificd the hds, conjunctiva, and different structures attached to the eyeball, isolate the optic nerve and cut away the muscles and fatty tissue. Open the anterior chainl)er of the eye by a transverse incision throufi;h the cornea. Study the physical characteristics of the aqueous humor. Remove the cornea and examine the iris and neighboring parts. By exerting a gentle pressure upon the outer coat of the eyeba
. Advanced lessons in practical physiology for students of medicine. Physiology. LESSON XXXIX THE SENSE ORGANS (Continued) VISION 1. Dissection of the Eye.—Procure an ox eye. Having itlontificd the hds, conjunctiva, and different structures attached to the eyeball, isolate the optic nerve and cut away the muscles and fatty tissue. Open the anterior chainl)er of the eye by a transverse incision throufi;h the cornea. Study the physical characteristics of the aqueous humor. Remove the cornea and examine the iris and neighboring parts. By exerting a gentle pressure upon the outer coat of the eyeball force the. Fig. 107.—Diagram of a Horizontal Section Through the Human Eye. C, Cornea; A, antorior cavity; P, cavity; L, Ions; J, iris; T, conjunctival sac; CL, ciliary ligament; CB, ciliary body; CM, ciliary niu.«cle; OS, ora serrata; CS, canal of Schlenim; R, retina; Ch, choroid; S, sclera; OA', optic nerve; A, retinal artery; B, blind spot; Y, yellow spot; OA, optical axis; VA, visual axis; H, hyaloid canal. lens through the pupillary orifice. Examine the lens, noting the degree of convexity of its anterior and posterior surfaces. Hold it over print. Place it under water. Can it be readily seen now? Explain. Open the posterior chamber widely, noting the differences in the color of the fundus. Explain. Identify the optic papilla and obtain an idea re- garding the location of the yellow spot. Note the characteristics of the vitreous humor. Examine histologic preparations of the cornea, iris, lens, and retina. 183. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Burton-Opitz, Russell, b. 1875. Philadelphia, London, W. B. Saunders Company
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