Just by definition myopia is a developed condition, usually by straining your eyes and staring to closely at things. Also easy access to eyeglasses and eye doctors could cause the condition.
I dont think this site OFFERS any direct cures, rather its a hodgepodge of people who want to be helpful whether they are right or wrong, as well as some who want to be dishonest for whatever reason. Dont expect any one site anywhere on the web to offer a complete solution to any of your problems. Its up to you to find the correct advice for your situation by using your ability to think.
I dont believe anyone can inherit myopia. Perhaps there could be some pharmaceutical or other chemical interaction. I have no idea what fasts or diets you try, but I do no believe diet is a major factor, and am not surprised that diet is not the cure.
I am not sure if some powerful herbal antioxidants would be any help for the condition such as astaxanthin, or gingko, or billberry, or blueberry, or carrots or ...??? But natural foods shouldnt do harm to try, so do some further research on these herbs. My own research shows that how you use and relax your eyes that will have the biggest effect. Here is another helpful and inspirational link to help you out: