The Ophthalmoscope and how to Use it: With Colored Illustrations, Descriptions, and Treatment of the Principal Diseases of the Fundus

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P. Blakiston's son & Company, 1906 - 298 pages
 

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Page iii - Diseases of the Eye. By EDWARD JACKSON, AM, MD, Professor of Diseases of the Eye in the Philadelphia Polyclinic and College for Graduates in Medicine...
Page 50 - Laws of Reflection : (1) The angle of reflection is equal to the angle of incidence. (2) The reflected and incident rays are both in a plane perpendicular to the reflecting surface.
Page 111 - The optic nerve spreads out upon the retina, r, in such a way that in its center there is produced a funnel-shaped depression, the vascular funnel, b, on whose inner wall the central artery, a. and the central vein, tp, ascend.
Page 110 - ... which latter extend, as the lamina cribrosa, transversely across the course of the optic nerve. The nerve is represented in front of the lamina as of light colour, because here it consists of nonmedullated, and hence transparent, nerve fibres.
Page 80 - EYE.- — (Landois.) a, Cornea ; b, conjunctiva ; c, sclerotic ; d, anterior chamber containing the aqueous humor ; e, iris ; ff, pupil ; g, posterior chamber ; /, Petit's canal ; j, ciliary muscle ; k, corneoscleral limit ; i, canal of Schlemm ; m, choroid ; n, retina; o, vitreous humor; No, optic nerve; q, nerve-sheaths ; p , nerve-fibers...
Page 110 - A, Ophthalmoscopic view : Somewhat to the inner side of the center of the papilla the central artery rises from below, and to the temporal side of it rises the central vein. To the temporal side of the latter lies the small physiologic excavation with the gray stippling of the lamina cribrosa.
Page 57 - Two laws govern the refraction of rays of light : 1. A ray of light passing from a rare into a dense medium is deviated toward the perpendicular (A in Fig.
Page 111 - The choroid, ck, shows a transverse section of its numerous blood-vessels, and toward the retina a dark line, the pigment epithelium; next the margin of the foramen for the optic nerve, and corresponding to the situation of the choroidal ring, the choroid is more darkly pigmented. ci is a posterior short ciliary artery which reaches the choroid through the sclera. Between the edge of the...
Page 110 - There is a free interspace remaining between the sheaths, consisting of the subdural space, sd, and the subarachnoid space, sa. Both spaces have a blind ending in the sclera at e. The sheath of dura mater passes into the external layers...
Page 17 - If we use the ophthalmoscope, or if we use atropine, or if we apply a. blister to the head, or adopt any new kind of treatment, the patient may blame us for his blindness, if he saw well before such procedures. A patient who reads the smallest print and supposes his sight to be good, may have double optic neuritis. The use of atropine affects his sight for near objects gravely, and if, from the advance of the neuritic process. what I may call retinal sight...

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