Thanks for the replies.
I wanted to understand myself what was involved before trying to communicate it to Bulgarian vets (my Bulgarian is OK but not up to technical or medical discussions!!).
So would I be right to say that when a dog is listed as PRA free (eg in the planned litter listings) that this is the result of the eye test?
Also, where can I get the blood test done (Laboklin have Shadow's DNA stored so I only need to get them to send to the appropriate place) if it is not possible to find someone in Bulgaria qualified to do the eye tests?