The hereditary genetics of myopia are incompletely understood and, unlike other genetic diseases, it is not possible to give exact figures for developing glaucoma from any father and mother. In my family I'm the only myopic person.
Well I'll answer my own question. I did read one study where they identified certain genes among those who ended up getting myopia which was shared in some cased with those not myopic. Those who had those genes were 40% likely to survive without glasses. So if you have three children, I would say the odds speaking you'd have two children without glasses half the time and one children out of the three the other half, just on sheer odds that would make sense.