March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
Imaging Properties Of Astigmatic Eyes At Near Vision
Author Affiliations & Notes
  • Hiroshi Uozato
    Ophthalmology/Visual Science, Kitasato Univ Grad Sch of Med Sci, Sagamihara, Japan
    Orthoptics and Vis Sci, Kitasato Univ Sch of Allied Health Sciences, Sagamihara, Japan
  • Maki Shindo
    Ophthalmology/Visual Science, Kitasato Univ Grad Sch of Med Sci, Sagamihara, Japan
  • Yuko Shibata
    Ophthalmology/Visual Science, Kitasato Univ Grad Sch of Med Sci, Sagamihara, Japan
  • Takushi Kawamorita
    Ophthalmology/Visual Science, Kitasato Univ Grad Sch of Med Sci, Sagamihara, Japan
  • Takushi Kawamorita
    Orthoptics and Vis Sci, Kitasato Univ Sch of Allied Health Sciences, Sagamihara, Japan
  • Footnotes
    Commercial Relationships  Hiroshi Uozato, None; Maki Shindo, None; Yuko Shibata, None; Takushi Kawamorita, None; Takushi Kawamorita, None
  • Footnotes
    Support  Kitasato Univ Grant-in-Aid for Research Project,No.2011-1014.
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 156. doi:
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    • Get Citation

      Hiroshi Uozato, Maki Shindo, Yuko Shibata, Takushi Kawamorita, Takushi Kawamorita; Imaging Properties Of Astigmatic Eyes At Near Vision. Invest. Ophthalmol. Vis. Sci. 2012;53(14):156.

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

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Abstract

Purpose: : To compare accommodative response in with-the-rule (WTR) and against-the-rule (ATR) astigmatism while viewing vertical and horizontal line target at near vision.

Methods: : Accommodative response was measured at 33cm while subjects viewed through dichroic mirror window in the Grand Seiko WAM-5500 binocular open-field autorefractor. Astigmatic blur was induced in fifteen healthy subjects (ages 19 - 26 years; mean spherical equivalent - 2.54 D; cylinder < - 0.75D) using plus cylinder lens (+0.00 D to +3.00D) for orientation control. Targets were a vertical line and a horizontal line. Each consisted of 40mm long and 1mm wide. Spherical equivalent measurements of approximately - 3.00D would indicate that subjects were accommodating to the 33cm target. For each targets, the mean of spherical equivalent data were calculated.

Results: : With WTR astigmatism ≥ 1.00D, the mean of the accommodative response obtained with the vertical line target were greater than with the horizontal line target( p < 0.05). With ATR astigmatism ≥ 1.00D, the mean of the accommodative response obtained with the horizontal line target were greater than with vertical the line target( p < 0.05).

Conclusions: : Posterior focal plane is better focus position than anterior focal plane while viewing a line target parallel to the steeper meridian in eyes. In the eyes with astigmatism, the uncorrected accommodative response varied according to the orientation of visual target.

Keywords: astigmatism • refraction • accommodation 
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