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Related Experiment Videos

Aging and human cone photopigments.

A E Elsner1, L Berk, S A Burns

  • 1Department of Ophthalmology, Eye and Ear Institute, Pittsburgh, Pennsylvania 15213.

Journal of the Optical Society of America. A, Optics and Image Science
|December 1, 1988
PubMed
Summary

Aging minimally affects cone photopigment optical density, but moderate illuminance color matching changes with age. This study investigated photoreceptor function changes in individuals aged 13-69.

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Area of Science:

  • Ophthalmology
  • Vision Science
  • Human Physiology

Background:

  • Photoreceptor function is crucial for vision.
  • Aging can impact visual perception and retinal function.
  • Understanding age-related changes in the eye is important for maintaining visual health.

Purpose of the Study:

  • To investigate age-related changes in human photoreceptor function.
  • To assess how aging affects cone photopigment optical density and color matching.
  • To utilize steady-state color matching as a noninvasive technique for evaluating retinal changes.

Main Methods:

  • Employed steady-state color matching, a noninvasive technique.
  • Measured optical density of cone photopigments.
  • Assessed illuminance required to bleach half of the photopigment.

Related Experiment Videos

  • Analyzed the ratio of primary wavelengths for color matching at moderate light levels across a wide age range (13-69 years).

    • Main Results:

    • Cone photopigment optical density showed minimal age-related changes (average 0.27 +/- 0.054), with slight nonmonotonic variations.
    • The illuminance to bleach half the photopigment remained relatively constant across observers (average 4.37 log Td +/- 0.119), with nonmonotonic age-related changes.
    • Moderate illuminance color matches demonstrated a monotonic decrease with age in the ratio of long-wavelength to short-wavelength primaries.

    Conclusions:

    • Aging has a limited impact on cone photopigment optical density in normal human retinas.
    • While photopigment bleaching levels are stable, color perception at moderate illuminance levels changes progressively with age.
    • Steady-state color matching is a valuable tool for quantifying age-related functional changes in the human retina.