I te tau kotahi mano e rima tekau ma rima, i kitea he glaucoma ia, kātahi ka puta he whāriki i ōna kanohi e rua.
Ko te tikanga, ko tētahi putanga matatini ake o te rerenga kōrero, "I te tau 1975, i kitea ia he glaucoma, kātahi ka kitea he cataracts i roto i ngā kanohi e rua, ā, i te tau 1983, kāore i taea e ia te mahi i tētahi atu mātakitaki ā-rorohiko".