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1.71 Blue Hlais HMC Optical lo ntsiab muag
Blue blocking tsom iav yog tsom iav uas tiv thaiv lub teeb xiav los ntawm khaus koj ob lub qhov muag. Cov tsom iav tshwj xeeb los tiv thaiv lub teeb xiav tuaj yeem cais tawm ultraviolet thiab hluav taws xob zoo thiab tuaj yeem lim lub teeb xiav, haum rau siv computer lossis TV xov tooj ntawm tes.
