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KMID : 1011420210260030151
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Journal of Korean Ophthalmic Optics Society
2021 Volume.26 No. 3 p.151 ~ p.160
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Effects of the Correlation between Base Curve of Silicone Hydrogel Contact Lenses and Corneal Curvature in Dry Eyes on the Quality of Vision and Subjective Satisfaction
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Choi Ji-Soo
Youn Na-Ra
Park Mi-Jung
Kim So-Ra
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Abstract
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Purpose: This study aimed to figure out the effect of wearing silicone hydrogel lenses with different base curves on the quality of vision and subjective satisfaction in dry eyes.
Methods: Forty two eyes in their twenties were classified as dry eyes based on their non-invasive break-up time, and were respectively fitted two silicone hydrogel lenses with same senofilcon A material except for base curve. Then, their corneal aberration, contrast sensitivity and subjective satisfaction were compared in three groups classified according to corneal curvature, which showed significant difference in corneal total aberration when wearing silicone hydrogel lens of each base curve.
Results: In group A with corneal curvature below 41.70 D, a significant superior effect was shown in corneal aberration and contrast sensitivity when wearing the lens with 9.0 mm-base curve compared to the lens with 8.5 mm-base curve; however, in group B with corneal curvature of 41.70~43.24 D, statistically lower corneal aberration was measured when wearing the lens with 8.5 mm-base curve, while the contrast sensitivity showed different results by cpd. On the other hand, statistically significant difference was not observed in group C with corneal curvature over 43.25 D when wearing each lens with different base curve. In the analysis of subjective satisfaction, the vision-related discomfort tended to be higher when wearing the lens with 9.0 mm-base curve in all groups, while ocular fatigue-related discomfort showed the same tendency only in group A below 41.70 D.
Conclusions: From the results, it was possible to suggest the base curve for silicone hydrogel lenses that shows superior effects in corneal aberration and contrast sensitivity according to the range of corneal curvature in dry eyes. Therefore, in order to increase the success rate of silicone hydrogel lenses in clinical prescription, it is necessary to manufacture silicone hydrogel lenses with several base curves to be applicable to various corneal curvature.
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KEYWORD
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Silicone hydrogel contact lenses, Base curve, Corneal curvature, Corneal aberration, Contrast sensitivity
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