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Related Experiment Video

Updated: Apr 20, 2026

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Binocular visual function of modified pseudophakic monovision.

Ken Hayashi1, Soichiro Ogawa1, Shin-Ichi Manabe1

  • 1Hayashi Eye Hospital, Fukuoka, Japan.

American Journal of Ophthalmology
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Modified monovision (0.75 D anisometropia) offers better intermediate vision and stereoacuity in pseudophakic patients compared to conventional monovision (1.75 D anisometropia), despite reduced near vision.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Pseudophakic monovision corrects presbyopia after cataract surgery.
  • Conventional monovision uses a larger induced anisometropia (1.75 D).
  • Modified monovision uses a smaller induced anisometropia (0.75 D).

Purpose of the Study:

  • To compare binocular visual function between modified (0.75 D) and conventional (1.75 D) monovision in pseudophakic patients.
  • To evaluate the impact of different anisometropia levels on visual acuity, contrast sensitivity, and stereoacuity.

Main Methods:

  • Prospective observational study involving 82 pseudophakic patients.
  • Simulated modified monovision (+0.75 D) and conventional monovision (+1.75 D) using spherical lenses.
  • Assessed binocular corrected visual acuity (VA) at various distances, contrast VA, glare VA, and stereoacuity.

Main Results:

  • Modified monovision showed significantly better intermediate VA (20/19 at 1.0 m) and stereoacuity (125 ± 100 arc seconds) than conventional monovision.
  • Near VA (20/51 at 0.3 m) and intermediate VA at 0.5 m were significantly worse with modified monovision.
  • Contrast VA and glare VA showed non-significant trends towards improvement with modified monovision.

Conclusions:

  • Modified pseudophakic monovision provides excellent far and intermediate binocular VA.
  • Near VA is reduced with modified monovision compared to conventional monovision.
  • Modified monovision improves stereoacuity and may offer better contrast vision, making it a viable option for presbyopia correction with minimal impact on binocular function.