There are actually two movies based on the book, Lathe of Heaven by Ursula K. Le Guin. PBS' original movie with Bruce Davison as George Orr was done in 1980. In 2002, Lukas Haas playing the main character and James Caan playing Dr. Haber in A&E's version.
The PBS film is closer to the book than the second version. While it has been released on video and dvd to celebrate its 20th anniversary, the original negatives had been lost and it was digitally remastered from aged video masters. It is very popular with the fans.
A&E's version is okay but if you can try to find the PBS' version.