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1.74 Ruwan tabarau na gani na Spin Photochromic Grey HMC
Amfanin ruwan tabarau mai canza launi shine cewa a yanayin hasken rana na waje, ruwan tabarau yana canzawa daga launin toka zuwa launin toka a hankali, kuma bayan ya koma ɗaki daga yanayin ultraviolet kuma a hankali ya koma mara launi, yana magance matsalar sanya tabarau don myopia, kuma yana cimma nau'ikan tabarau na ciki da waje.
