Ma'anar ƙamus na kalmar "anisometropia" wani yanayi ne wanda ikon refractive idanu biyu ya bambanta sosai, yana haifar da kuskure marar daidaituwa tsakanin idanu biyu. A cikin sauƙi, yana nufin yanayin da ido ɗaya yana da wani magani daban-daban ko kuskuren warwarewa idan aka kwatanta da ɗayan ido. Wannan yanayin na iya haifar da ruɗewar gani, damuwan ido, da wahalar mai da hankali sosai. Ana iya haifar da Anisometropia ta hanyoyi daban-daban, kamar bambance-bambance a cikin girman ko siffar idon ido, bambance-bambance a cikin curvature na cornea, ko bambance-bambance a cikin tsawon ido. Ana iya gyara shi da gilashin ido, ruwan tabarau, ko kuma a wasu lokuta, tare da aikin tiyata.