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Correlation of myopia severity with visual performance.

Bryan Chin Hou Ang1,2, Kai Xiong Cheong3,4, Mellisa Mei Hui Tan4

  • 1National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, Singapore. drbryanang@gmail.com.

International Ophthalmology
|May 10, 2020
PubMed
Summary
This summary is machine-generated.

High myopia significantly reduces corrected distance visual acuity (CDVA) and contrast sensitivity (CS), with greater myopia correlating to poorer vision. Axial length (AL) also impacts visual performance.

Keywords:
AsiansContrast sensitivityMyopiaVisual acuity

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • High myopia, defined by a spherical equivalent (SE) of ≤ -6.00 D, affects a significant portion of the population.
  • Understanding the impact of high myopia on visual performance is crucial for patient care and management.

Purpose of the Study:

  • To investigate and describe the visual performance, including corrected distance visual acuity (CDVA) and contrast sensitivity (CS), in individuals with high myopia.
  • To examine the relationship between the degree of myopia (SE) and axial length (AL) with visual performance metrics.

Main Methods:

  • A cross-sectional study involving 148 emmetropes and 564 high myopes, categorized into three myopia severity groups.
  • Multivariate regression analyses were employed to assess the association between CDVA (photopic, mesopic, SVT-NVG) and CS (mesopic, SVT-NVG) with SE and AL, adjusting for age and ethnicity.

Main Results:

  • Higher degrees of myopia were significantly associated with reduced CDVA and CS, and increased axial length (AL) (all p < 0.001).
  • Individuals in the lower range of high myopia (Group 1: SE -6.00 to > -8.00 D) demonstrated better CDVA and CS compared to those with higher myopia (Groups 2 and 3).
  • Reduced visual acuity and contrast sensitivity were strongly correlated with decreased spherical equivalent (SE) and increased axial length (AL) (all p < 0.001).

Conclusions:

  • High myopia is definitively linked to diminished visual acuity and contrast sensitivity.
  • The severity of myopia and increased axial length are key factors contributing to reduced visual performance in myopic individuals.