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KMID : 1011420190240010061
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Journal of Korean Ophthalmic Optics Society
2019 Volume.24 No. 1 p.61 ~ p.69
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Evaluation of Reliability for Spectacles Prescription Using Auto Phoropter and Trial Lens
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Lee Hyung-Kyun
Jung Won-Young
Park Mi-Jung
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Abstract
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Purpose: The present study aimed to evaluate the difference in the corrected visual acuities between the prescription using an auto phoropter/trial lens and the spectacles dispensed.
Methods: One hundred and ten eyes were tested with an auto phoropter, trial lens/spectacles with same dioptrical power; their corrected visual acuities were then measured.
Results: The corrected visual acuity decreased in the following order: spectacles, trial lens, and auto phoropter and the differences in the acuities were statistically significant. The visual acuity using spectacles, trial lens, and phoropter coincided in only 29% of the cases, and the visual acuity using trial lens and phoropter coincided in only 39.7% of the cases. As the spherical power and cylindrical power increased, the differences in the corrected visual acuity using spectacles, trial lens, and phoropter also increased. When the correlation between spherical power and corrected visual acuity was analyzed according to the degree of cylindrical power, the difference between trial lens and spectacles was not significant in cases with no astigmatism, and trial lenses were more accurate than the phoropter.
Conclusions: The findings of this research indicate the state of over refraction changes, according to the vision testing method, spherical power, and cylindrical power. To minimize the differences in corrected visual acuity, it is necessary to provide and use the information for correction of error.
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KEYWORD
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Auto phoropter, Trial lens, Spectacles, Corrected visual acuity, Spherical power, Cylindrical power, Vision testing method
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