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Related Experiment Videos

Accommodation with higher-order monochromatic aberrations corrected with adaptive optics.

Li Chen1, Philip B Kruger, Heidi Hofer

  • 1Center for Visual Science, University of Rochester, Rochester, New York 14627, USA. lchen@cvs.rochester.edu

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|February 16, 2006
PubMed
Summary

Some individuals use higher-order monochromatic aberrations to guide eye accommodation. Correcting these aberrations did not improve accommodative responses in most subjects, indicating individual differences in visual processing.

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Area of Science:

  • Ophthalmology
  • Visual Neuroscience

Background:

  • Higher-order monochromatic aberrations influence how the human eye perceives stimuli.
  • These aberrations could potentially provide a signed error signal for the eye's accommodation system.

Purpose of the Study:

  • To investigate the role of higher-order monochromatic aberrations in guiding the accommodative response.
  • To determine if correcting these aberrations impacts the accuracy of accommodation to vergence changes.

Main Methods:

  • Experiments involved 0.5 D step changes in vergence.
  • Adaptive optics were used to either preserve or remove higher-order monochromatic aberrations.
  • Accommodative responses were measured in six human subjects.

Main Results:

Related Experiment Videos

  • One subject could not accommodate in either condition; another required higher-order aberrations to accommodate.
  • Four subjects accommodated correctly even after higher-order aberrations were removed.
  • Correcting higher-order aberrations did not enhance accommodative response in any subject.

Conclusions:

  • At least some individuals utilize higher-order monochromatic aberrations to guide accommodation.
  • Some subjects can accommodate effectively even with reduced higher-order aberrations and other cues.
  • Significant individual variability exists in accommodative ability under challenging visual conditions.