
It also depends on your breed and the eye tests that it needs. The glaucoma testing only needs to be done once in a life time unless there's a query on the original test. Tests for PRA etc. should be done yearly as it can develop at any age.
Join us and I'm sure that the many people on here who are more knowlidgeable than me will be able to help you:d It's free.
edited: boy my spelling is terrible tonight but it's staying on :d