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.
En lugar de encontrar lo que pensábamos, que la ceguera era causada en su mayoría por glaucoma y tracoma, nos sorprendimos al encontrar que la ceguera era en realidad causada por cataratas.