Ophthalmic Literature, Vol. 18: A Quarterly Publication Including the Ophthalmic Year Book, Containing Bibliographies, Digests and Indexes of the Literature of Ophthalmology, for the Year 1921-1922 (Classic Reprint)
Ophthalmic Literature, Vol. 18: A Quarterly Publication Including the Ophthalmic Year Book, Containing Bibliographies, Digests and Indexes of the Literature of Ophthalmology, for the Year 1921-1922 (Classic Reprint)
Excerpt from Ophthalmic Literature, Vol. 18: A Quarterly Publication Including the Ophthalmic Year Book, Containing Bibliographies, Digests and Indexes of the Literature of Ophthalmology, for the Year 1921-1922 Visual acuity. A new metric scale for measuring the acuteness of v1s1on is proposed by Dor. It consists of a series of black circles and black squares on a white ground. For the distance of 10 meters, the black circle has a diameter of mm. The black square has a side of mm., both having the same area. In the series ...
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Excerpt from Ophthalmic Literature, Vol. 18: A Quarterly Publication Including the Ophthalmic Year Book, Containing Bibliographies, Digests and Indexes of the Literature of Ophthalmology, for the Year 1921-1922 Visual acuity. A new metric scale for measuring the acuteness of v1s1on is proposed by Dor. It consists of a series of black circles and black squares on a white ground. For the distance of 10 meters, the black circle has a diameter of mm. The black square has a side of mm., both having the same area. In the series he presents, the sizes are such as should be distinguished with a visual acuity ranging from to The per son tested of course has to decide whether the figure indicated is a circle or a square. It was devised to meet the problem of testing illiterate sol diers, and is called a universal opto metric scale. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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