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Using Pattern Classification to Measure Adaptation to the Orientation of High Order Aberrations

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  • Lucie Sawides
  • Carlos Dorronsoro
  • Andrew M Haun
  • Eli Peli
  • Susana Marcos

Abstract

Background: The image formed by the eye's optics is blurred by the ocular aberrations, specific to each eye. Recent studies demonstrated that the eye is adapted to the level of blur produced by the high order aberrations (HOA). We examined whether visual coding is also adapted to the orientation of the natural HOA of the eye. Methods and Findings: Judgments of perceived blur were measured in 5 subjects in a psychophysical procedure inspired by the “Classification Images” technique. Subjects were presented 500 pairs of images, artificially blurred with HOA from 100 real eyes (i.e. different orientations), with total blur level adjusted to match the subject's natural blur. Subjects selected the image that appeared best focused in each random pair, in a 6-choice ranked response. Images were presented through Adaptive Optics correction of the subject's aberrations. The images selected as best focused were identified as positive, the other as negative responses. The highest classified positive responses correlated more with the subject's Point Spread Function, PSF, (r = 0.47 on average) than the negative (r = 0.34) and the difference was significant for all subjects (p

Suggested Citation

  • Lucie Sawides & Carlos Dorronsoro & Andrew M Haun & Eli Peli & Susana Marcos, 2013. "Using Pattern Classification to Measure Adaptation to the Orientation of High Order Aberrations," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-10, August.
    • Handle: RePEc:plo:pone00:0070856
    DOI: 10.1371/journal.pone.0070856
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    References listed on IDEAS

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    1. Lucie Sawides & Pablo de Gracia & Carlos Dorronsoro & Michael A Webster & Susana Marcos, 2011. "Vision Is Adapted to the Natural Level of Blur Present in the Retinal Image," PLOS ONE, Public Library of Science, vol. 6(11), pages 1-6, November.
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