April 2011
Volume 52, Issue 14
Free
ARVO Annual Meeting Abstract  |   April 2011
The Effect Of Astigmatic Blur On Stereopsis
Author Affiliations & Notes
  • Maki Shindo
    Ophthalmology and Visual Science, Kitasato University Graduate School of Medical Science, Sagamihara, Japan
  • Yuko Shibata
    Ophthalmology and Visual Science, Kitasato University Graduate School of Medical Science, Sagamihara, Japan
  • Nanami Nakayama
    Ophthalmology and Visual Science, Kitasato University Graduate School of Medical Science, Sagamihara, Japan
  • Takushi Kawamorita
    Ophthalmology and Visual Science, Kitasato University Graduate School of Medical Science, Sagamihara, Japan
    Orthoptics and Visual Science, Kitasato University School of Allied Health Science, Sagamihara, Japan
  • Hiroshi Uozato
    Ophthalmology and Visual Science, Kitasato University Graduate School of Medical Science, Sagamihara, Japan
    Orthoptics and Visual Science, Kitasato University School of Allied Health Science, Sagamihara, Japan
  • Footnotes
    Commercial Relationships  Maki Shindo, None; Yuko Shibata, None; Nanami Nakayama, None; Takushi Kawamorita, None; Hiroshi Uozato, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science April 2011, Vol.52, 5717. doi:
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    • Get Citation

      Maki Shindo, Yuko Shibata, Nanami Nakayama, Takushi Kawamorita, Hiroshi Uozato; The Effect Of Astigmatic Blur On Stereopsis. Invest. Ophthalmol. Vis. Sci. 2011;52(14):5717.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To determine the effect of astigmatic blur on stereopsis and whether this is dependent on the axis of the astigmatism at near ( 40 cm ) and distance ( 6 m ) .

Methods: : Astigmatic blur was induced in fourteen healthy subjects ( mean age; 22.5 years, mean spherical equivalent; - 2.92 D ) using plus cylinder lens ( + 0.5 D to + 3.0D ) for orientation control. Horizontal, vertical, and oblique ( 45 ° × left eye and 45 °× right eye ) astigmatism was induced with three binocular axis steps. Stereopsis was recorded at near and distance using OPTEC 6500 Vision Tester® ( Stereo Optical, Inc. ) .

Results: : Stereopsis degraded with increasing astigmatic blur at near and distance. At distance, with-the-rule astigmatism had the least effect ( p < 0.05 ). There were no significant differences between the three orientations at near stereopsis. The effect of astigmatic blur on stereopsis at near is less than that at distance ( p < 0.01 ).

Conclusions: : The effect of astigmatic blur on stereopsis depended on the axis of the astigmatism and examination distance.

Keywords: binocular vision/stereopsis • astigmatism • perception 
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