Progressive retinal atrophy (PRA) is a group of inherited diseases that causes progressive degeneration of the light sensitive cells at the back of the eye. Dogs with PRA have normal sight at birth, ...

The new DNA test means there is no reason why another English Shepherd Dog ever needs to be born with progressive retinal atrophy, which causes total blindness. Progressive retinal atrophy (PRA) is a ...

This article predates Brown Brothers Media’s ownership of Science Blog and has not been reviewed under our current editorial process. It is preserved as part of the publication’s archive. The new DNA ...