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1.74 Blue Coat HMC Optical lo ntsiab muag
Qhov tsom iav 1.74 txhais tau hais tias lub lens nrog qhov ntsuas pom ntawm 1.74, uas yog ib qho uas muaj qhov ntsuas siab tshaj plaws ntawm lub khw, thiab ib qho nrog lub lens tuab tshaj plaws. Lwm qhov tsis sib npaug, qhov siab dua qhov ntsuas qhov ntsuas pom, lub lens thinner, thiab nws yuav kim dua. Yog hais tias qhov degree ntawm myopia yog ntau tshaj 800 degrees, nws yog suav hais tias yog ultra-siab myopia, thiab ib tug refractive index ntawm 1.74 yog haum.
