Regardless of your age or physical health, it is important for everyone to have regular eye exams. When an eye doctor examines your eyes, he or she is doing more than checking to see if you need glasses. During a complete eye exam, your eye doctor will not only determine your prescription for eyeglasses or contact lenses, but will also check your eyes for common eye diseases, assess how your eyes work together as a team and evaluate your eyes as an indicator of your overall health.