ArticleInternational journal of ophthalmology2024
Effect of astigmatism and spherical equivalent correction on contrast sensitivity.
Article in International journal of ophthalmology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Frequency-dependent associations of contrast sensitivity and corneal aberrations after SMILE PRO in eyes with high astigmatism.Frontiers in medicine · 2026Article
- Effect of active vision therapy on contrast sensitivity in bilateral amblyopia.International journal of ophthalmology · 2026Article
- Refractive Surprises After Cataract Surgery: Identification and Management in Optometric Practice- A Comprehensive Review.Clinical optometry · 2026Review
- Effect of polarized sunglasses on visual functions.International journal of ophthalmology · 2025Article
- Guidelines for preoperative visual function and imaging examination standards in vitreoretinal surgery (2025).International journal of ophthalmology · 2025Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimTo investigate the effect of astigmatism and spherical equivalent (SE) correction on contrast sensitivity (CS).
methodsIn this cross-sectional study, 103 visually normal subjects aged 18 to 36y with bilateral regular astigmatism in range of 1.00 diopter cylinder (DC) to 4.00 DC and normal best-corrected visual acuity (20/20) were recruited. Binocular CS was assessed by linear sine-wave gratings at 1.5, 3, 6, 12, and 18 cycles per degree (cpd), before correction of astigmatism, after full correction of astigmatism by cylindrical spectacle lenses, and after SE of refractive error. The repeated measures ANOVA and Bonferroni test were used to compare the effects of astigmatism correction on logCS.
resultsTotally 39 patients were male and 64 patients were female with the mean age of 28.25±5.38y. The average degree of astigmatism in right and left eye was 2.03±0.83 and 2.10±0.78, respectively. Increases in uncorrected astigmatic power correlated with decreases in the logCS, especially at high spatial frequencies. A statistically significant difference in logCS was found between these three cases: before correction of astigmatism, after SE of refractive error, and after full correction of astigmatism by cylindrical spectacle lenses at all frequencies (
conclusionBinocular astigmatism defocus decreases CS depending on the degree of astigmatism power; correction of this will improve patent's quality of vision. Although high astigmatism refractive error (more than 2.00 DC) that is fully corrected by cylindrical spectacle lenses doesn't increase the CS to the maximum value, especially at higher spatial frequencies (12 and 18). Also SE refractive error effects on improving CS in low astigmatism power (less than 2.00 DC), especially at lower spatial frequencies.
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