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.
Ao invés de encontrar o que pensávamos que era o caso -- que a cegueira era causada principalmente por glaucoma e tracoma -- ficamos espantados ao descobrir ao invés disso que a cegueira era causada por catarata.