An eye exam involves a series of tests designed to evaluate your vision and check for eye diseases. Your doctor may use a variety of instruments, aim bright lights directly at your eyes, and request that you look through a seemingly endless array of lenses. Each test during an eye exam evaluates a different aspect of your vision. A comprehensive eye exam is one of the best ways to protect your vision because it can detect eye problems at their earliest stage - when they're most treatable. Regular eye exams give your Optometrist a chance to help you correct or adapt to vision changes and provide you with tips on caring for your eyes.