The Optometry Admission Test (OAT) is a comprehensive examination that enables optometry education programs to assess the knowledge and preparedness of program applicants. OAT results are accepted by all optometry schools in the U.S. and select schools in Canada. The Association of Schools and Colleges of Optometry (ASCO) is the governing body for the OAT. The test is implemented by the Department of Testing Services (DTS), which is a shared service of the American Dental Association. For complete information on all aspects of the OAT, refer to the OAT Candidate Guide.