A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.
一种防治近视眼
器，它有作为物镜凸透镜、镜筒、目镜，还有头套和透镜组，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物像清楚、放大和变远。
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;;A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.
一种防治近视眼器，它有作为物镜凸透镜、镜筒、目镜，还有头套和透镜组，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物像清楚、放大和变远。
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