If you have vision problems of your own, you can't help your kid until after you help yourself. Your kid will imitate the way you use your eyes. You're whom he probably picked up those kinds of subtle habits from in the first place. If you (or another parent or guardian) have poor vision, first practice the Bates method successfully yourself before trying to teach it to the kid. If your vision is already good, you probably have noticed times when your vision isn't perfect, and you can put the method to use on yourself in order to understand how it works. You can't teach something that you don't understand, and you don't understand it well enough to teach it until you've recovered your vision yourself.
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"I conceive that the great part of the miseries of mankind are brought upon them by false estimates they have made of the value of things." - Benjamin Franklin