Instead of finding out what we thought was the case -- that blindness was caused mostly by glaucoma and trachoma -- we were astounded to find out that blindness was caused instead by cataract.
Azt gyanítottuk, hogy a vakságot zömében zöld hályog és trachoma okozza. Megdöbbenve tapasztaltuk, hogy a vakságot nem azok, hanem szürke hályog okozza.