Hello! We just bought my youngest daughter 2 pairs of glasses at Walmart on the recommendation of several friends. They have great prices and some cute styles! My daughter also has an astigmatism, and her glasses seem very comfortable for her (she even wants to sleep in them), so I believe the lenses were made properly and the glasses fit her properly. They do offer anti-glare (though we didn't get that option because my daughter tends to lose and/or destroy her glasses so I cheaped out =).
In the past we bought glasses at Kaiser and Lenscrafters, and the glasses were nice there also. They had all the designer brands (Prada, Vera Wang, etc.) if that's important to you.
I will say this. I bought 2 pairs of glasses at Walmart and the total bill was less than 1 pair at Kaiser, Lenscrafters, and other places I have gone before. I have heard that Costco has really good prices on glasses, also, but I never think to go there for some reason!