May 2004
Volume 45, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2004
Quantitative measurement of ocular dominance as clinical application in monovision.
Author Affiliations & Notes
  • T. Handa
    Ophthalmology, Doctor's Program of Medical Science, Kitasato University Graduate School, Sagamihara, Japan
  • H. Uozato
    Ophthalmology, Department of Orthoptics and Visual Science, School of Allied Health Sciences, Kitasato University, Sagamihara, Japan
  • K. Mukuno
    Ophthalmology, Department of Orthoptics and Visual Science, School of Allied Health Sciences, Kitasato University, Sagamihara, Japan
  • R. Minei
    Ophthalmology, Department of Ophthalmology, Kitasato University of Medicine, Sagamihara, Japan
  • M. Nitta
    Ophthalmology, Department of Ophthalmology, Kitasato University of Medicine, Sagamihara, Japan
  • K. Shimizu
    Ophthalmology, Department of Ophthalmology, Kitasato University of Medicine, Sagamihara, Japan
  • Footnotes
    Commercial Relationships  T. Handa, None; H. Uozato, None; K. Mukuno, None; R. Minei, None; M. Nitta, None; K. Shimizu, None.
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 313. doi:
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    • Get Citation

      T. Handa, H. Uozato, K. Mukuno, R. Minei, M. Nitta, K. Shimizu; Quantitative measurement of ocular dominance as clinical application in monovision. . Invest. Ophthalmol. Vis. Sci. 2004;45(13):313.

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

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Abstract

Abstract: : Purpose: To develop a new quantitative measurement of ocular dominance, and to elucidate the relationship between ocular dominance and patient satisfaction with monovision. Methods: The durations of exclusive visibility of dominant and nondominant eye target in binocular rivalry were measured in normal subject (study1: 20 subjects), and monovision patients induced by implanted intraocular lenses (study 2: 16 successful and 4 unsuccessful patients), monovision patient induced by LASIK (study 3: 1 successful patients). In study 1, 2 and 3, contrast of targets in one eye was fixed at 100%. Contrast of the target in other eye was varied from 100% to 80% to 60% to 40 % to 20%, using a rectangular grating of 2c/dg at 4deg in size. Quantities of ocular dominance were evaluated as reversal point where exclusive visibility of nondominant eye crossed over that of dominant eye. Results: In study 1, most subjects (75%) showed reversal point at 80% and 60%; the others (25%) showed reversal point at 40% and 20%. The reversal point defined as magnitude of ocular dominance. Reversal point 80% and 60% are weak magnitude comparison with 40% and 20%. In study 2, the reversal points (20% and not at all) in unsuccessful patients were a significant lower contrast than that (80% and 60%) in successful patients (p<0.05), which indicate strong magnitude (80%) of ocular dominance. In study 3, successful patient has a weak magnitude of ocular dominance before and after monovision induced by LASIK. Conclusions: The present technique seems to be a useful method for clinically quantifying ocular dominance that can be used to evaluate the magnitude of ocular dominance and prospective evaluation of monovision technique.

Keywords: aging • refractive surgery • binocular vision/stereopsis 
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