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한선희(Sun-Hee Han),김봉환(Bong-Hwan Kim),강효원(Hyo-Won Kang),김란(Ran Kim),변지선(Ji-Sun Byeon),배소현(So-Hyeon Bae),장성영(Seong-Yeong Jang),김형수(Hyeong-Su Kim) 한국안광학회 2020 한국안광학회지 Vol.25 No.3
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.