If you are interested, there is an annual free eye screening event organized by ACVO (American College of Veterinary Ophthalmologists) and sponsored by Stokes Pharmacy and others. Information, details and registration can be found at this web site:
https://www.acvoeyeexam.org/ (<–copy/paste this link into your browser)
Registration starts April 1, 2017 and runs through April 30. Exams are held throughout May.
This only includes the eye examination, not overall wellness or follow-up testing or treatments if needed. Tucson is included in the list of available cities, but the locally participating clinics are not provided until after you have registered.