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.
一种防治近视眼的理疗器,它有作为物镜的凸透镜、镜筒、目镜,还有透镜,它用在近距离上长时间用眼时戴在眼上,可以使被视物的像清楚、放大变远。
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.
一种防治近视眼的理疗器,它有作为物镜的凸透镜、镜筒、目镜,还有透镜,它用在近距离上长时间用眼时戴在眼上,可以使被视物的像清楚、放大变远。
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