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1.56 Bifocal Flat top / Round Top / Blended HMC optical lenses
Ruwan tabarau na Bifocals ruwan tabarau ne na gani waɗanda ke ɗauke da sassan gyara kuma galibi ana amfani da su don gyaran presbyopia. Yankin da bifocals ke gyara hangen nesa na nesa ana kiransa yankin hangen nesa na nesa, kuma yankin da ke gyara yankin hangen nesa na kusa ana kiransa yankin hangen nesa na kusa da yankin karatu. Yawanci, yankin da ke nesa ya fi girma, don haka ana kiransa babban yanki, kuma yankin da ke kusa ya fi ƙanƙanta, wanda ake kira ƙaramin yanki.
