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Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

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Published on: March 29, 2022

Visual performance with lenses correcting peripheral refractive errors.

David A Atchison1, Ankit Mathur, Saulius R Varnas

  • 1*PhD, DSc, FAAO †PhD, FAAO ‡PhD School of Optometry & Vision Science and Institute of Health & Biomedical Innovation (DAA, AM), Queensland University of Technology, Kelvin Grove, Queensland; and Carl Zeiss Vision (SRV), Lonsdale, South Australia, Australia.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|September 17, 2013
PubMed
Summary
This summary is machine-generated.

Specialty lenses can correct peripheral hyperopia, significantly improving visual performance in the peripheral visual field. These custom lenses are most beneficial for individuals with substantial peripheral refractive errors.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Peripheral refractive error, particularly hyperopia, can impact visual performance.
  • Standard corrective lenses primarily focus on central visual acuity, often neglecting peripheral vision needs.

Purpose of the Study:

  • To design and manufacture specialized lenses to correct peripheral refraction along the horizontal meridian.
  • To evaluate the impact of these lenses on visual performance, specifically detection acuity and contrast thresholds.

Main Methods:

  • Subjective refraction was determined using best peripheral detection acuity across the horizontal visual field (±30°).
  • Objective refractions were obtained using a COAS-HD aberrometer for comparison.
  • Custom lenses were fabricated based on optimized designs to correct measured peripheral refraction.
  • Visual performance (grating detection, contrast thresholds) was re-assessed with the custom lenses.

Main Results:

  • The participant exhibited significant relative peripheral hyperopia (up to 2.9 D), especially temporally.
  • On-axis correction degraded peripheral visual acuity and increased contrast thresholds compared to best correction.
  • The specialized lenses largely restored peripheral visual performance, with aperture-smoothed designs showing potential advantages.

Conclusions:

  • It is feasible to design and produce lenses that optimize peripheral visual performance up to ±30° along a visual meridian.
  • The benefits of such corrective lenses are most pronounced in individuals with significant peripheral refractive errors (e.g., ~2 D).