Thanks Chris. I might not be a horrible idea to see a neurologist. But like I said, I did already describe my situation to my doctor who said it was similar to cases she had seen with people who had used harder drugs. She didn't seem to be worried that there was something else wrong, but I had her call a optometrist to be sure, and they didn't seem to be worried either. The annoying thing with it all is spending a bunch of money, and then being told that you are in "excellent condition". As far as being genetic, I know my younger brother told me he quite smoking weed after doing it lightly for several months because he was having trouble with his eyes. My theory is that cannabis can do the same damage that some of the harder hallucinogens do, but only in large amounts, and that people who are predisposed stopped using it early enough that there is relatively little damage done, and it never gets reported. Anyway, I have heard that HPPD from cannabis has a good recovery rate, anywhere from three to ten years, so fingers crossed