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AIDS IN THE FITTING OF CONTACT LENSES

AIDS IN THE FITTING OF CONTACT LENSES This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables. Abstract The fitting of contact lenses can be expedited by a saving of time and trouble in the determination of the visual curve. The usual procedure requires measurement of the radius of curvature of the anterior corneal surface with the ophthalmometer and determination of the apparent axial refraction of the eye by neutralization of the patient's spectacle lens. Whenever astigmatism is present the radius of either one of the principal corneal meridians as well as the axial refraction of the eye in that same meridian must be measured. Application of these two measurements to either the graph or the scale supplied by the Zeiss Company will give the approximate required curve for the inner surface of the corneal segment of the contact lens. An afocal contact lens with this corneal radius is then placed over the eye. Finally, additional spherical lenses are placed before the eye in a trial frame until http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Ophthalmology American Medical Association

AIDS IN THE FITTING OF CONTACT LENSES

Archives of Ophthalmology , Volume 21 (4) – Apr 1, 1939

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Publisher
American Medical Association
Copyright
Copyright © 1939 American Medical Association. All Rights Reserved.
ISSN
0003-9950
eISSN
1538-3687
DOI
10.1001/archopht.1939.00860040085008
Publisher site
See Article on Publisher Site

Abstract

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables. Abstract The fitting of contact lenses can be expedited by a saving of time and trouble in the determination of the visual curve. The usual procedure requires measurement of the radius of curvature of the anterior corneal surface with the ophthalmometer and determination of the apparent axial refraction of the eye by neutralization of the patient's spectacle lens. Whenever astigmatism is present the radius of either one of the principal corneal meridians as well as the axial refraction of the eye in that same meridian must be measured. Application of these two measurements to either the graph or the scale supplied by the Zeiss Company will give the approximate required curve for the inner surface of the corneal segment of the contact lens. An afocal contact lens with this corneal radius is then placed over the eye. Finally, additional spherical lenses are placed before the eye in a trial frame until

Journal

Archives of OphthalmologyAmerican Medical Association

Published: Apr 1, 1939

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