The Vision Training approach for Myopia varies depending on the degree of nearsight you have. For less than 2 diopters or less the exercises mainly consist of activities encouraging your eyes to focus further and furter away and notice smaller and smaller objects. To restore your natural clear vision from 2 diopters or less takes a few days or a week or two in most cases. There are people who have regained as much as 3 diopters in as many days.
To recover your normal vision from 3 diopters of more is a longer proceces which involves wearing reduced prescrition glasses, so your eyes have room to work. Also you have to spend 5 mins. exercising your eyes about 10 times a day. In total you need to allocate one hour a day to your eye exercises.
The exercises varies depending on what stage you are in. With high degree of Myopia - 5 to 10 diopters or more - most people can achieve 0.5 diopter or even 1 diopter improvement per month. This improvement is directly related to the amount of effort you put in. No exercise, no improvement.
There are people who have regained as much as 6 diopters in a year. In other words they have recovered more Myopia than most people have. Vision Training is effective in the same way weight reduction or fitness programs are effective. They work as lon as you do. With eyesight you will be please to know that the improvement tend to last. Your Myopia seldom regress after you have regained it.
Of course it is a lot easier to recover just a few diopters than to go from say 8 diopters to natural clear eyesight. However, the good news is that it is possible for you to do.