This test is for people whose vision has not changed, have recently completed a comprehensive eye exam, and are looking to renew an expiring Hubble prescription. If the test detects that your vision has changed, your prescription will not be renewed. And we recommend that you see an in-person doctor. If this is your first prescription, you will need to consult an eye care professional for an eye examination. This test does not replace an initial eye examination. It does not perform or replace a comprehensive eye examination, nor does it assess eye health. Consult an eye care professional for a comprehensive eye examination yearly or any time you are experiencing pain or discomfort. This test is not intended to diagnose, treat, mitigate, or cure disease.