How do you treat astigmatism for a preschool child and at what age are contact lenses recommended?

My sister and I both has astigmatism. We both have to wear glasses. We are both a good candidate for the new lasik eye surgery, whenever we are ready for it. As for contact lenses every person that wants them can't always wear them. My sister can not because her eyes are too far set back in her head. But as for me I can, but I don't because I can't stand the thought of putting contacts in my eyes. Only her eye doctor can tell her if she would be able to wear contacts.