Xa kuziwa kwiilensi ze-eyewear, yintoni eyenza ilensi elungileyo?Zininzi izinto ezibandakanyekayo, kuquka ukucaca, ubunzima, ukuqina, kunye nokuxhathisa ukunxiba kunye namabala.Kodwa ngaba oko kwanele?Ngokweengcali, ilensi elungileyo kufuneka ikwazi ukubhloka ukukhanya okuluhlaza okwesibhakabhaka, imisebe ye-ultraviolet, ...
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