The walgreens could be the good place for you to buy the contact lenses. Many people who have bought eyeglasses from there say the quality of eyeglasses is good. About the price, it is a little higher than those in Walmart. About where to buy the contact lenses, you just follow your formal experience because know the quality clearly there.
Yes, you can buy contact lenses at walgreens. It seems not expensive to buy contact lenses there. And one of my friend has bought a box there. He said it is OK. And they offer various contact lenses such as Acuvue Lenses, Air Optix Lenses, CooperVision Lenses and CIBA Vision Lenses etc. You can choose it according to your needs.