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1.56 Bifocal Flat sare / Wareegga sare / muraayadaha indhaha ee HMC ee isku dhafan
Muraayadaha Bifocals waa muraayadaha indhaha ee ka kooban labada goobood ee sixitaanka waxaana ugu horrayn loo isticmaalaa sixitaanka presbyopia. Meesha ay bifocals-ku toosiyaan aragtida fog waxaa lagu magacaabaa fog vision area, meesha saxda ah ee aagga aragga u dhowna waxaa loo yaqaannaa aagga vision u dhow iyo aagga wax akhriska. Caadi ahaan, aagga fog ayaa ka weyn, sidaas darteed waxaa sidoo kale loo yaqaannaa jeexjeexa ugu weyn, iyo aagga u dhow waa yar yahay, oo loo yaqaan 's jeex'.
