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角膜基质内环 (ＩＣＲＳ)由 2个 1 5 0°的弧形ＰＭＭＡ半环组成 ,植入角膜基质后 ,可改变角膜前表面曲率 ,用于治疗轻、中度近视。美国食物与药品管理局 (ＦＤＡ)在评估该手术安全性和有效性的Ⅱ期和Ⅲ期临床试验中 ,对近视患者和对照者共 44 9例 (72 5眼 )植入了ＩＣＲＳ。结
The corneal stroma inner ring (ICRS) is composed of two 150 ° arc-shaped PMMA half-rings. Implantation of the corneal stroma changes the curvature of the anterior corneal surface for the treatment of mild to moderate myopia. In phase II and phase III clinical trials evaluating the safety and efficacy of the procedure, the Food and Drug Administration (FDA) administered a total of 449 (725) patients with myopia and controls with ICRS implants. Knot