File:Manual of ophthalmology (1917) (14776584974).jpg

Identifier: manualofophthalm00unit (find matches)
Title: Manual of ophthalmology
Year: 1917 (1910s)
Authors: United States. Surgeon-General's Office. Division of surgery
Subjects: Ophthalmology Ophthalmology
Publisher: Washington : G.P.O.
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
orbit, through the ethmoid, into the nose, which not only securesan adequate drainage, but permits the subsequent washing out of thetract. Indeed, the frequent association of sinus disease with orbitalcellulitis usually demands that the incision shall be so placed andsufficiently broad to render exploration of the orbital walls prac-ticable and treatment of the affected sinus (frontal or ethmoid)possible. CHAPTEE XI.COMMONER OPHTHALMOSCOPIC APPEARANCES. In the section devoted to syphilis and tuberculosisreference was made to the usual ophthalmoscopicclicative of these infections. The scope and intentdo not permit any extended description of the usemoscope in a study of the eye ground, in short, orbut it seems advisable to add a brief account of aportant fundus lesions. Normal fundus.—Viewed with the ophthalmoscope,method, the optic nerve appears as a nearly round of the eye briefappearances in-of this manualof the ophthal-opthalmoscopy,few of the im- using the director slightly oval
Text Appearing After Image:
Fig. 18.—The normal fundus of the righb eye examined by the direct method of ophthalmoscopy. disk, situated toward the nasal side, varying in color from a grayishpink to a more decided red, the tint being most marked upon thenasal half, while the center is occupied by a whiter patch—the light 103 104 MANUAL OF OPHTHALMOLOGY. spot—marking the position of the entrance and emergence of theretinal vessels. The general tint of the optic disk varies with theage and complexion of the patient and with the intensity of thecolor of the surrounding eye ground. The papilla is bounded by two rings. The outer one, dark colored,usually incomplete or existing only as a slight crescent of pigmentupon one or the other side, is the choroidal ring, and represents theborder of the choroidal coat, where this is pierced by the optic nerve.Within this is a faint white stripe, more distinct in elderly people,the scleral ring, which indicates the rim of the sclerotic coat. Thechoroidal ring is often impe

Note About Images