Kids Need Our Help

My sister and I were talking to one another on the phone yesterday and she was mentioning that she will have to get glasses for the kids and herself and her husband. But the cost is astronomical and so the littlest one comes first.  I asked how much? oh around 500 bucks. I almost fell off my chair.  So I am putting a SHOUT out there...If anyone knows of any programs for low income families to maybe get some sort of assistance in this area that would be wonderful.