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1.56 Xiav Txiav Photochromic Grey HMC Optical lenses
Lub lens yog ib yam khoom pob tshab uas muaj ib lossis ntau qhov chaw nkhaus ua los ntawm cov khoom siv kho qhov muag xws li iav lossis resin. Tom qab txhuam, nws feem ntau raug sib sau ua ke rau hauv cov tsom iav nrog lub thav iav kom kho tus neeg siv lub zeem muag thiab tau txais qhov pom tseeb.
Qhov tuab ntawm lub lens feem ntau nyob ntawm qhov refractive index thiab degree ntawm lub lens. Myopic lens nyias nyob hauv nruab nrab thiab tuab nyob ib ncig ntawm ntug, thaum hyperopic lens yog qhov sib txawv. Feem ntau qhov degree siab dua, lub lens tuab dua; Qhov refractive index siab dua, lub lens nyias dua.
