File:The student's guide to diseases of the eye (1884) (14776532974).jpg

Identifier: studentsguidetod1884nett (find matches)
Title: The student's guide to diseases of the eye
Year: 1884 (1880s)
Authors: Nettleship, Edward, 1845-1913
Subjects: Eye Color blindness Ophthalmology Ophthalmology Eye Diseases Color Perception Color Vision Defects
Publisher: London : J. & A. Churchill
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ne, or with the addition of a lens inthe clip or disc behind it, but without the interven-tion of the objective lens. By this method the parts (unless the eye bemyopic) are seen in their true position (Fig. 33)the upper part of the image corresponding to theupper part of the fundus, the right to the right, &c ,it is therefore of ten called the method of the erector upright image ; though, as will be seen below,these terms are not strictly convertible with directexamination. It is used—(1) to detect opacitiesin the vitreous humour and detachments of theretina; — (2) To ascertain the condition of thepatients refraction, i. e. the relation of his retina tothe focus of his lens-system; (3) For the minuteexamination of the fundus by the highly magnified,virtual, erect image (Fig. 34). (1.) To examine the vitreous humour. The patientis to move his eye freely in different directions, whilstthe light is reflected into it from a distance of a foot 4 50 OPHTHALMOSCOPIC EXAMINATION oCO c
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