Just read a post elsewhere about a narcoleptic who has been taking provigil for some time. In Aug 02 woke up with double vision. Went thru all the cat, mri, eyd dr and all showed no cause. All Drs. said was not caused by medication but had no explaination for the cause and it was most likely permanent damage. Patient had no sight without the aid of special prism lenses for 5 months. Dr. said all eye muscles had allowed his eyes to cave in. Patient decided to stop Provigil on his own and in a few days vision returned and after 20 day it was back to normal. This could be a very rare occurance but if you are taking Provigil just beware if you should have vision problems. All drugs have really bad side effects for a few and do wonders for others. We as patients just need to know what to look for.