Ruwan tabarau guda ɗaya suna da takardar sayan magani guda ɗaya don hangen nesa, kusanci, ko astigmatism.
Yawancin gilashin magani da gilashin karatu suna da ruwan tabarau na gani guda.
Wasu mutane suna iya amfani da gilashin hangen nesa guda ɗaya na nesa da kusa, ya danganta da nau'in takardar sayan magani.
Ruwan tabarau guda ɗaya don masu hangen nesa sun fi kauri a tsakiya.Ruwan tabarau guda ɗaya don masu sawa tare da hangen nesa kusa sun fi kauri a gefuna.
Ruwan tabarau guda ɗaya gabaɗaya suna kewayo tsakanin 3-4mm cikin kauri.Kauri ya bambanta dangane da girman firam da kayan ruwan tabarau da aka zaɓa.
Tags:1.74 ruwan tabarau, 1.74 ruwan tabarau guda daya