... use 4.CE EN166 standard Product Name: safety medical dental glasses eyewear anti-fog coatedModel No.: CJ-1Product DetailsPacking & DeliveryStandardCE ... your skin.(2) Measure it: in most cases, lens thickness & glasses weight is critical factor of quality, the thicker & the heavier ... , the better.(3) Wear it: the glasses are required to be zero diopter, the inferior will cause ...