playing concave
打凹
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Methods Hypermetropia and myopia were induced by playing concave and convex lens in front of eyes of 32 subjects.
方法在正常眼前放置正、负球镜，人工诱导单纯性远视、近视性屈光参差。
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