基弧区非球面设计角膜塑形镜对客观视觉质量的影响

doi:10.3760/cma.j.cn115909-20210204-00044

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Abstract Objective: To analyze the influence of base curve aspheric orthokeratology on objective optical quality. Methods: This was a prospective study. Sixty patients (60 eyes) were recruited in Shenyang Aier Optometry Eye Hospital from August 2018 to March 2019. Patients were divided into two groups. The aspheric group (30 eyes) were treated with base curve aspheric orthokeratology and the spheric group (30 eyes) were treated with base curve spheric orthokeratology. Ocular and corneal higher-order aberrations (HOA), spherical aberrations (SA), coma, trefoil and modulation transfer function (MTF), and the Strehl ratio (SR) within a 5 mm pupil diameter were measured before and 6 months after orthokeratology. Only the left eye data were selected for analysis. Data were analyzed with paired t tests, an independent samples t test and Mann-Whitney U test. Results: At 6 months after wearing the lenses, the root mean squares (RMS) of the ocular HOA, SA, and coma aberrations had increased and MTF and SR had decreased in the two groups compared to before lens wear. The differences in these variables were statistically significant (P<0.001). The RMS of the corneal trefoil in the spheric group and aspheric group also increased compared to before lens wear and the differences were statistically significant (t=-3.69, P=0.001; t=-3.41, P=0.002). The comparison between the two groups showed statistically significant differences in ocular HOA, SA and coma (t=4.36, P<0.001; t=2.13, P=0.038; t=4.51, P<0.001), and corneal HOA and coma (t=2.84, P=0.006; t=2.69, P=0.009). There were no statistically significant differences in the other aberrations and MTF and SR between the two groups. Conclusions: The different designs of orthokeratology base curve lenses impact the patient's objective optical quality. Patients have a better objective optical quality after wearing base curve aspheric orthokeratology lenses compared to base curve spheric orthokeratology lenses.

Key words： myopia orthokeratology base curve aspheric design objective optical quality

Received: 04 February 2021

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Corresponding Authors: Jiwen Yang, Aier School of Ophthalmology, Central South University, Changsha 410015, China; Shenyang Aier Eye Hospital, Shenyang 110003, China (Email: yangjiwen1975@vip.163.com)

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https://www.cjoovs.com/EN/10.3760/cma.j.cn115909-20210204-00044 OR https://www.cjoovs.com/EN/Y2021/V23/I8/583

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