Some doctor will suggest leave the contacts out for 24 hours before the exam ,but some say it is better for you to wear your contacts to the eye exam . That is really confusing . In my opinion , if you want your eye doctor to see how your contacts are fitting and make sure there are no further problems , you should wear them . If you want to know the real condition of your eyes , you'd better not wear them . If you are unsure ,call your doctor and ask his opinion .