So don't expect a quick in-and-out visit. Before you can even be fitted for your contact lenses, you have to have a comprehensive eye exam, which includes not just figuring out your prescription, but also a few tests assessing the inside and outside health of your eye, says Thau. After that, you'll have the contact lens fitting, where the doctor will take measurements of the front of your eye and select diagnostic lenses — aka trial lenses — for you to test out.
