Journal of Otolaryngology and Ophthalmology of Shandong University ›› 2020, Vol. 34 ›› Issue (2): 42-46.doi: 10.6040/j.issn.1673-3770.1.2020.015

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Changes in visual quality during the ultra-early stage of SMILE for middle and low myopia

ZHAO Yang1, FU Yanyan1, WU Xiaoying1,2,YIN Yewei1,2, XIANG Aiqun1, LU Ying1,   

  1. 1. Department of Ophthalmology, Xiangya Hospital Central South University, Changsha 410008, Hunan, China;
    2. Hunan Key Laboratory of Ophthalmology, Changsha 410008, Hunan, China;
    3. Department of Epidemiology, XiangYa School of Public Health, Central South University, Changsha 410078, Hunan, China
  • Published:2020-04-07

Abstract: Objective To observe the changes in visual quality within 24h(the ultra-early stage)after small incision lenticule extraction(SMILE)and explore the possible reasons behind these changes. Methods Forty-six eyes of 23 patients who underwent SMILE were chosen for this study. A subjective visual quality of questionnaire(SVQ)was competed by the patients before the procedure and 24 hours after treatment. The best-corrected visual acuity of the patients(distant vision 5 m, middle vision 60 cm, near vision 33 cm), contrast sensitivity(CS), glare sensitivity(GS), the near point of convergence(NPC)and the amplitude of accommodation(AA)were measured using a Binocular Vision Function Instrument(OCULUS Binoptometer 4p). Results The SVQ score illustrated a decrease in visual quality after SMILE at the ultra-early stage (P=0.001). However, uncorrected distance visual acuity(UCVA)significantly improved (P=0.000 1). When comparing best-corrected visual acuity(BCVA), there was no difference between the distant vision results (P=0.096), but both the middle vision and near vision results were lower than before treatment (P=0.039, 0.003). CS and GS decreased following treatment (P=0.000 1, 0.04), but there was no difference in the NPC and AA (P=0.68, 0.13). Conclusion Patients can expect improved distant vision in the ultra-early stage of SMILE. However, at the ultra-early stage, the middle vision and near vision have not yet recovered. The SVQ changes at the ultra-early stage of SMILE may be related to the changes in CS and GS.

Key words: Small incision lenticule extraction(SMILE), Ultra-early stage, Visual quality, Contrast sensitivity, Glare sensitivity

CLC Number: 

  • R779.63
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