If you have sudden outset of markedly blurred vision call an Eye MD and speak with the ophthalmologist on call or go to a ER. Almost all have Eye MDs that staft them.
JCH MD
A doctor will respond to this post sometime today. Per your first post, you've been taking medication for the flu for a couple of days, and you started having eye spasms and blurred vision. You might try calling your pharmacist to see if blurred vision is a possible side effect of the medication you've been taking. Or (better yet) you could contact the doctor who prescribed the medication (through his/her answering service) for advice.