Some medications have been shown to carry risk for vision alteration. We usually see these patients in conjunction with a complete eye exam, with several additional tests that may be helpful in assessing the status of one’s vision such as: visual field testing, optical coherence tomography, corneal topography, depth perception and color vision testing. These tests are performed by a technician and interpreted by your physician. A report letter is sent to your medical physician who prescribes the high-risk medication. Plaquenil is the most common medication in use that requires regular visual function screening.