Hollywood Ending (2002)

Woody Allen plays Val Waxman, a film director, who was once big in the 1970's but is now reduced to directing TV commercials. Finally, he gets an offer to make a big film. But, disaster strikes when Val goes temporarily blind due to paranoia. So, he and a few friends, cover up his disability, without the studio executives knowing that he is directing the film blind!

Official website: http://www.dreamworks.com/hollywoodending/