Outlines of Ophthalmology (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1856 edition. Excerpt: ...meniscus--anterior and posterior chambers, communicating through pupil--delicate membrane, lining posterior chamber, seems result of change in pigment cells of ciliary processes and uvea after death--chemical composition of aqueous humour--is speedily regenerated--serous and yellow in diseased state. 4. Cornea--a segment of hollow sphere--See Part II. Section I. Functions By refraction, to bring the pencils of light, which may be supposed to flow from every point of every object, to corresponding focal points on the retina, without iridescence, and at whatever distance the object may be placed. Dimensions of some parts of human eye--proportions of humours--connexions of different structures of eyeball. SECTION VI ARTERIES OF EYEBALL. 1. Arteria centralis retina--perforates optic nerve from below, along with corresponding vein--ramifies from papilla conica in four or five branches, covered only by membrana limitans of retina--capillary network, formed by these branches, seated partly in stratum fibrillosum, but chiefly in stratum gangliosum--experiment of Furkinje, by which spectrum may be seen of retinal arteries--in foetus, branch of arteria centralis, called arteria humoris vitrei, passing through canalis hyaloideus to backof crystalline, is distributed to vascular sac of crystalline--See Part II. Section X.--2. Choroideal arteries, posterior or short ciliaries.--thirty or forty in number, derived from ophthalmic artery and its branches--penetrate posterior part of sclerotica--give off twigs to sclerotica--having reached choroid, subdivide into branches, some of which pass into veins, others form capillary plexus on inner surface of choroid, the capillaries arising from the larger arteries in a stelliform manner, and constituting tunica...