A Randomized Trial to Evaluate the Effect of Toric Versus Spherical Contact Lenses on Vision and Eyestrain.
Eye Contact Lens
; 45(1): 28-33, 2019 Jan.
Article
em En
| MEDLINE
| ID: mdl-30562274
ABSTRACT
OBJECTIVES:
To compare the effect of toric versus spherical soft contact lenses on objective measures of visual performance using visual acuity and electromyography of the orbicularis oculi muscle.METHODS:
Current soft contact lens wearers with -0.75 to -1.75 D astigmatism in each eye were binocularly fitted with toric (1-Day ACUVUE MOIST for astigmatism) and spherical (1-Day ACUVUE MOIST) contact lenses in random order. After each fitting and at 1-week follow-up, high- and low-contrast visual acuities were measured. Electromyography was used to objectively evaluate eyestrain. Linear mixed models were used to assess differences between toric and spherical contact lenses.RESULTS:
The mean age (±SD) of the 60 participants was 27.5±5.0 years, spherical refractive error was -3.68±2.01 D, and cylinder was -1.28±0.36 D. High- and low-contrast visual acuities with toric lenses were better than with spherical lenses at both fitting (toric high-contrast -0.065±0.078 and low-contrast 0.133±0.103 vs. spherical high-contrast 0.001±0.104 and low-contrast 0.224±0.107) and follow-up (toric high-contrast -0.083±0.087 and low-contrast 0.108±0.107 vs. spherical high-contrast -0.015±0.095 and low-contrast 0.211±0.104) (all P<0.0001). Electromyography-measured eyestrain was less with toric versus spherical contact lenses at fitting (least-square ratio of toric over spherical=0.72; P=0.0019) but not at follow-up (ratio=0.86; P=0.11).CONCLUSION:
These results suggest that toric contact lenses provided improved objective measures of vision in a low-to-moderate astigmatic population.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Refração Ocular
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Erros de Refração
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Acuidade Visual
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Astenopia
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Lentes de Contato Hidrofílicas
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Músculos Oculomotores
Tipo de estudo:
Etiology_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adolescent
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Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article