Radial keratotomy and glare effects on contrast sensitivity

A. Atkin, Penny Asbell, N. Justin, H. Smith, R. Wayne, J. Winterkorn

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

After radial keratotomy (RK) to correct myopia, some patients complain of 'glare'. Effects of a glare source on contrast sensitivity were measured in fifteen patients after unilateral RK. With each eye, determinations were made of the contrast required for detection of steady gratings (spatial frequencies of 0.7 and 2.9 cycles/deg), and for detection of flicker (unpatterned field flickering at rates of 8, 16, and 32 Hz). Grating or flicker was presented on a centrally fixated 4 deg test target (34 cd/m2 mean luminance), surrounded by a diffuse glare source (1700 cd/m2 mean luminance). For each stimulus, contrast thresholds were determined with glare-source off and with glaresource on. 'Glare loss' was defined as the decrement in contrast sensitivity measured with the glare source on. Significant findings were: (1) Both eyes showed glare losses for detection of gratings and for detection of flicker; (2) Spectacle lenses increased glare losses both for gratings and for flicker; (3) The RK eye showed a larger glare loss for flicker than the unoperated eye, but a smaller glare-loss for gratings; (4) For both flicker and gratings, glare loss tended to be greater in the RK eye, compared to the unoperated eye, in subjects who had larger pupil diameters in the testing situation; (5) The psychophysical measurements obtained in this study were not significantly correlated either with a questionnaire index of glare complaints or with the score obtained with the Miller-Nadler GlareTester.

Original languageEnglish (US)
Pages (from-to)129-148
Number of pages20
JournalDocumenta Ophthalmologica
Volume62
Issue number2
DOIs
StatePublished - Feb 1 1986

Fingerprint

Radial Keratotomy
Glare
Contrast Sensitivity
Myopia
Pupil
Lenses

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems
  • Physiology (medical)

Cite this

Atkin, A., Asbell, P., Justin, N., Smith, H., Wayne, R., & Winterkorn, J. (1986). Radial keratotomy and glare effects on contrast sensitivity. Documenta Ophthalmologica, 62(2), 129-148. https://doi.org/10.1007/BF00229125

Radial keratotomy and glare effects on contrast sensitivity. / Atkin, A.; Asbell, Penny; Justin, N.; Smith, H.; Wayne, R.; Winterkorn, J.

In: Documenta Ophthalmologica, Vol. 62, No. 2, 01.02.1986, p. 129-148.

Research output: Contribution to journalArticle

Atkin, A, Asbell, P, Justin, N, Smith, H, Wayne, R & Winterkorn, J 1986, 'Radial keratotomy and glare effects on contrast sensitivity', Documenta Ophthalmologica, vol. 62, no. 2, pp. 129-148. https://doi.org/10.1007/BF00229125
Atkin, A. ; Asbell, Penny ; Justin, N. ; Smith, H. ; Wayne, R. ; Winterkorn, J. / Radial keratotomy and glare effects on contrast sensitivity. In: Documenta Ophthalmologica. 1986 ; Vol. 62, No. 2. pp. 129-148.
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