In October 2008, when he was almost 2 years old, Trevor was given a routine Optigen screening for PRA. PRA (progressive retinal atrophy) is a genetically transmitted disease that leads to blindness. Even though PRA is extremely rare in Golden Retrievers, Trevor was found to be "affected" with prcd-PRA.
From the Optigen website:
PRA refers to a group of diseases that cause the retina of the eye to degenerate slowly over time. The result is declining vision and eventual blindness. “prcd” stands for “progressive rod-cone degeneration” which is the type of PRA known in several breeds.
Jan. 2016: To date neither Trevor nor any of the other 4 prcd-PRA-affected Goldens I personally know have shown any symptoms, nor has any evidence of retinal degeneration been detectable in their annual eye exams. Trevor recently finished his PACH3 agility title, and he is now training for his JH. He shows no signs of compromised eyesight at age 9.
Trevor's Supplement Regime.