Characteristics of the study population used in the study<sup>a</sup>.
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The ± sign is a standard deviation. aThe study population after quality control procedures. bFor the calculations of refraction, 177 eyes (29.8%) in the first stage and 303 eyes (28.4%) in the second stage that had undergone cataract surgery or corneal refractive surgery were excluded.
创建时间：
2009-09-25
