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[Study of corrected visual performance and vision quality].

Jia Qu1, Fan Lü, Xin-Jie Mao

  • 1School of Optometry & Ophthalmology, Wenzhou Medical College, 325003 Zhejiang, China. dscl@mail.wzptt.zj.cn

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|August 5, 2003
PubMed
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Rigid gas-permeable (RGP) lenses provide superior distance visual acuity and contrast sensitivity in myopia patients compared to spectacles and soft contact lenses. This highlights RGP as the optimal choice for correcting myopia.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Myopia is a common refractive error affecting visual acuity.
  • Assessing vision quality requires evaluating both visual acuity and contrast sensitivity function.
  • Different refractive correction methods may impact visual performance differently.

Purpose of the Study:

  • To compare visual acuity (VA) and contrast sensitivity function (CSF) across three refractive correction methods for myopia.
  • To analyze visual performance and vision quality under spectacles, soft contact lenses, and rigid gas-permeable lenses.

Main Methods:

  • Twenty-three myopic college students (41 eyes) were corrected with spectacles (SP), soft contact lenses (SCL), and rigid gas-permeable lenses (RGP).
  • Distant and near LogMar VA and CSF were measured under each correction method.

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  • Randomized correction procedures and standardized charts minimized subjective bias.

    • Main Results:

    • Rigid gas-permeable lenses (RGP) yielded significantly better distance visual acuity (VA) compared to spectacles (SP) and soft contact lenses (SCL).
    • No significant difference in near VA was found, though RGP showed a slight advantage.
    • Rigid gas-permeable lenses (RGP) demonstrated superior contrast sensitivity function (CSF) at middle and high spatial frequencies.

    Conclusions:

    • Rigid gas-permeable (RGP) lens correction provides the highest visual acuity quality for individuals with myopia.
    • Contrast sensitivity function (CSF) serves as an effective indirect measure for evaluating corrected retinal image quality.