This disease causes progressive blindness and is common in many breeds. (vetbabble.com)
But it is also extremely serious — symptoms include progressive blindness, severe seizures and the loss of language, swallowing and motor skills. (cam.ac.uk)
Doctors at the Hadassah - Hebrew University Medical Center in Jerusalem (Israel) found consistent symptoms of progressive blindness in three patient families that indicated the presence of a previously unknown genetic defect. (sciencedaily.com)