During a comprehensive eye exam, the doctor might not only
determine the prescription, but also
evaluate them as an indicator of your overall health, Assess how they move and focus,Check your eyes for common eye diseases.
An eye exam involves a series of tests to evaluate your vision and check for eye diseases. Your eye doctor is likely to use various instruments, shine bright lights at your eyes and request that you look through an array of lenses. Each test during an eye exam evaluates a different aspect of your vision or eye health.
Why it's done?
An eye exam helps detect eye problems at their earliest stage — when they're most treatable. Regular eye exams give your eye care professional a chance to help you correct or adapt to vision changes and provide you with tips on caring for your eyes. And an eye exam might provide clues to your overall health.