I just had my annual eye exam and the doctor gave me a new test that he uses to measure the amount of retina pigmentation loss one experiences after the age of 30.
This is a relatively new test. He gave me a copy of it to put on my computer so I can test myself every few weeks. I asked for permission to forward it to others and he graciously said I could, seeing it was new and so valuable. So, I am sending it to family and friends over the age of 30.