1. 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，可以使被视物的像清楚、放大和变远。
2. Main product:F600 lens for large size engineering duplicate, F300 lens for writing projector, lens for engrave machine, CCD lens and various protecting goggles from laser radiation. 主要产品：F600大型工程复印镜头、F300书写投影镜头、雕刻机镜头、CCD镜头、各种激光防护眼镜。
3. Main product:F600 lens for large size engineering duplicate, F300 lens for writing projector, lens for engrave machine, CCD lens and various protecting goggles from laser radiation. 主要产品：F600大型工程复印镜头、F300书写投影镜头、雕刻机镜头、CCD镜头、各种激光防护眼镜。
4. Cylindrical lens method: cylindrical lens can be seen as being a lot of convex lens piece-by-side components of lens plate that has divided like. 柱面透镜法：柱面透镜可以看不败由许众凹透镜片并排构不败的透镜不活，它具有不不不合像功用。
5. The straight line type lens barrel is sleeved in the driving lens barrel in parallel mobile mode relative to the axle center of the fixed lens barrel. 直进镜筒采可相对于该固定镜筒的轴心平行移动方式套合于该驱动镜筒内。
