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Effect of magnification and field of view on reading speed using a CCTV *

Effect of magnification and field of view on reading speed using a CCTV * Reading speeds were measured in 18 subjects with normal vision and 10 with low vision for each of 20 experimental conditions with different magnifications and field sizes on the Closed Circuit Television System (CCTV). There was a significant difference between the results for the two groups of subjects. These results suggested that in low‐vision patients with faster reading speeds, minimum magnification for maximum field size on the CCTV would be valid advice. For low‐vision patients who read more slowly, reading speed may improve at higher magnifications despite reduced field size. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ophthalmic and Physiological Optics Wiley

Effect of magnification and field of view on reading speed using a CCTV *

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References (25)

Publisher
Wiley
Copyright
Copyright © 1988 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0275-5408
eISSN
1475-1313
DOI
10.1111/j.1475-1313.1988.tb01029.x
Publisher site
See Article on Publisher Site

Abstract

Reading speeds were measured in 18 subjects with normal vision and 10 with low vision for each of 20 experimental conditions with different magnifications and field sizes on the Closed Circuit Television System (CCTV). There was a significant difference between the results for the two groups of subjects. These results suggested that in low‐vision patients with faster reading speeds, minimum magnification for maximum field size on the CCTV would be valid advice. For low‐vision patients who read more slowly, reading speed may improve at higher magnifications despite reduced field size.

Journal

Ophthalmic and Physiological OpticsWiley

Published: Apr 1, 1988

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