Dr. Raizman addresses current diagnostic tests for dry eye. Dry eye is best identified using patient-reported symptoms and slit-lamp findings, but it can be confirmed using supportive diagnostic tests such as osmolarity and MMP-9. He advises to treat only confirmed cases and to consider nonablative refractive procedures in these cases. There are many new diagnostic tests evaluating the tear film, but clinical trails are required to determine the efficacy of these tests in screening for refractive surgery.