After my mom lost her sight. They ran more tests...genetic tests. They tested others in the family and found out that her brother, my Uncle Bill had VHL too.
They were able to save Uncle Bill's vision by catching the Angiomas early. Their treatments were done at UCLA's Jules Stein Institute.
They dialate your pupils, they numb your eye and you sit with your chin in a strap...just like when they check your vision.
They point a laser beam at the Angioma and "zap it". The heat from the laser acutually cauterizes the Angioma.
It's important to get checked regularly because these Angiomas will more than likely continue to "pop up" throughout your lifetime.