With all due respect to that doc, any layperson with ten minutes of free time, a net connection, or a phone line could easily find out
perindopril DOES indeed cause many variations of vision impairments, and they are very common. This is indictitive of the general attitude and shows this person didn't even take a moment to qualify their response which they should understand will affect the poser of the question and their health and trust in the medical system.