Why are Eye Exams Important? Catching problems in their early stages can prevent vision loss. An eye exam can do this by catching things you havenât yet noticed. Preparing for an Eye Exam Make the most of your exams by knowing how often to get them, and what information to bring with you. Your Comprehensive Eye Exam Learn what common tests and procedures to expect during a routine eye exam. Eye Exams for Contact Lenses A routine exam won’t provide some of the measurements and testing that are required to determine if your eyes are suitable for contact lens wear, and to generate your contact lens Rx.