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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 11, Iss. 7 — Jul. 1, 1994
  • pp: 1958–1969

Foveal flicker sensitivity in healthy aging eyes. II. Cross-sectional aging trends from 18 through 77 years of age

Charlene B. Y. Kim and Melanie J. Mayer  »View Author Affiliations

JOSA A, Vol. 11, Issue 7, pp. 1958-1969 (1994)

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Foveal flicker contrast sensitivity was measured for healthy adults at temporal frequencies from 2.5 to 50 Hz. The first experiment compared two-interval forced-choice (2IFC) and yes-no detection (Y–N) testing procedures for younger (19–33-year-old) and older (67–73-year-old) observers. The 2IFC technique resulted in higher absolute estimates of sensitivity. However, within a method, relative differences were similar. Therefore the two methods gave similar estimates of temporal contrast-sensitivity change with age. Experiment 2 compared 89 observers from 18 through 77 years of age to explore the effect of the time course of aging on flicker sensitivity. The 2IFC procedure was used, and retinal illuminance changes with age were controlled. Significant overall losses in contrast sensitivity were found for the 45–54, 55–64, and 65–77-year-old age groups. Overall sensitivities for the 35–44-year-old group were comparable with or (not significantly) higher than those for the 18–24- and 25–34-year-old groups. The results suggested that (1) foveal temporal contrast sensitivity does not decline until after 44 years, (2) losses after 44 years are in amplitude but not in temporal resolution of the visual response, and (3) the mean rate of loss is ∼0.78 decilog per decade after 44 years. These results are consistent with the existence of three phases of development of temporal contrast sensitivity over the life span. The results also emphasize the importance of including healthy-eyed age-matched controls in studies of flicker sensitivity in visual dysfunctions that affect mainly older adults.

© 1994 Optical Society of America

Original Manuscript: December 9, 1992
Revised Manuscript: February 15, 1994
Manuscript Accepted: February 18, 1994
Published: July 1, 1994

Charlene B. Y. Kim and Melanie J. Mayer, "Foveal flicker sensitivity in healthy aging eyes. II. Cross-sectional aging trends from 18 through 77 years of age," J. Opt. Soc. Am. A 11, 1958-1969 (1994)

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