https://smartstore.naver.com/multiscan/products/4952531176?NaPm=ct%3Dkb9yhcw0%7Cci%3Dee3aa14db923dc4d2846bc6edc5dd9de037fda6a%7Ctr%3Dplac%7Csn%3D189112%7Chk%3Dc5a886bdc30a0d2523ef5afbc897e465835a9226
시력보호기능 있다고 하는데 있고 없고 큰 차이 있는지요??