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1.74 Xiav Coat HMC Optical lenses
Cov tsom iav 1.74 txhais tau tias lub lens nrog refractive index ntawm 1.74, uas yog qhov muaj refractive index siab tshaj plaws hauv kev ua lag luam, thiab qhov uas muaj lub lens tuab nyias tshaj plaws. Lwm cov kev ntsuas sib npaug, qhov refractive index siab dua, lub lens nyias dua, thiab nws yuav kim dua. Yog tias qib myopia ntau dua 800 degrees, nws suav tias yog ultra-high myopia, thiab refractive index ntawm 1.74 yog qhov tsim nyog.
