Kalmar "Central artery of the retina" tana nufin wani jirgin jini da ke samar da iskar oxygen da sinadarai zuwa tsakiyar kwayar ido, wanda ke bayan ido. A retina wani nau'in nama ne mai haske wanda ke layi a saman ido na ciki kuma yana taka muhimmiyar rawa wajen gani. Babban jijiya na retina reshe ne na jijiyar ido, wanda ke fitowa daga jijiya na carotid na ciki kuma yana ba da jini zuwa sassa daban-daban a cikin ido. Toshewar jijiya ta tsakiya na retina na iya haifar da hasarar gani kwatsam kuma mai tsanani a cikin idon da abin ya shafa, yanayin da ake kira tsakiyar retinal occlusion.