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Improving the Reliability of the Pelli-Robson Contrast Sensitivity Test

Bullimore, Mark A., Elliot, David B, Bailey, Ian L.·1991·Noninvasive Assessment of the Visual System

Abstract

The clinical applications of contrast sensitivity testing have been discussed in numerous reports, and a number of printed contrast sensitivity tests are commercially available. Some of these tests use letters as targets rather than sine or square wave gratings (Regan and Neima, 1983; Pelli et al., 1988). Letter contrast sensitivity charts have the advantage of being quick to administer and the nature of the task is familiar to both the patient and the practitioner. The letter identification task has the advantage of being a multiple-alternative forced-choice procedure that limits patient criterion effects (Vaegen and Halliday, 1983). The Pelli-Robson chart (Pelli et al., 1988) consists of sixteen triplets of letters, with each letter subtending 3 degrees at the recommended viewing distance of 1 meter. Within each triplet the letters have the same contrast and the contrast in each successive triplet decreases by a factor of 0.15 log units (√2). Pelli et al. recommend scoring contrast sensitivity as the lowest contrast level at which at least two of the triplet are identified correctly.

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Metadata

Authors
Bullimore, M. A., Elliot, D. B., & Bailey, I. L.
Venue
Noninvasive Assessment of the Visual System
Published
1991
Pages
MD12
OpenAlex
W1598965288
Cited by
253
References
4
FWCI
6.58
Type
conference paper
Language
en
Open access
closed

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CoChat. (2026). Citation check: Improving the Reliability of the Pelli-Robson Contrast Sensitivity Test. https://app.cochat.ai/papers/10.1364/navs.1991.md12
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Bullimore, M. A., Elliot, D. B., & Bailey, I. L. (1991). Improving the Reliability of the Pelli-Robson Contrast Sensitivity Test. Noninvasive Assessment of the Visual System. https://doi.org/10.1364/navs.1991.md12

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