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KMID : 1011420200250030283
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Journal of Korean Ophthalmic Optics Society
2020 Volume.25 No. 3 p.283 ~ p.289
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Study of Visual Function Changes According to the Induced Astigmatic Axis Error
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Han Sun-Hee
Kim Bong-Hwan
Kang Hyo-Won
Kim Ran
Byeon Ji-Sun
Bae So-Hyeon
Jang Seong-Yeong
Kim Hyeong-Su
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Abstract
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Purpose: In this study, we investigated visual function changes according to the effect of the axis error of astigmatism occurring during refraction or optical dispensing.
Methods: In 32 young adults (21.76±2.84 years) with astigmatism ranging from ?0.25 D to ?3.00 D, after complete correction with subjective refraction, the axis of the cylinder lens was artificially rotated from 5° to 30° in the right eye in random order. The maximum corrected visual acuity, maximum control power, ease of control, fusion time, and distant and near stereoscopic visions were evaluated.
Results: As the astigmatic axis changed, all visual functions declined, and in particular, statistically significant differences were seen in an astigmatic axis change of 10°-15° or more.
Conclusions: In correcting the astigmatism axis, if an error of more than 10° occurs, it may decrease the visual function; therefore, accurate astigmatism axis correction is required.
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KEYWORD
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Astigmatic axis, Accommodative amplitude, Accommodative facility, Fusional time, Stereoacuity
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