Dr. Tracy Leonard, a B breeder and vet holds a CERF eye and tatoo clinic every year at her office and it is held on a Saturday, usually in January. This is in Dayton, OH. The closest vet opthalmologists are in Columbus and Cincinnati.
I would also check with your vet and see who he/she refers to when it comes to eye problems.
There is a calendar of clinics, not just eye, on the ofa website at www.offa.org under Upcoming Health Clinics. This is the same website where one checks for Fanconi and other health test results. I doubt all clinics are posted there though.
Jennifer