Genetic If you'll notice, my parents have one eye short. The ball is 25% shorter than the eye or both eyes short. The children are born, they will have the opportunity to eye 30 – 40% short.
If you notice, it is found that the genetic parents have one child myopia myopia, has 25% or line ตาสั้น both. Child born, it will have the opportunity to myopia 30 - 40%.