I'm guessing you mean who takes or accepts CarCareOne credit cards. Three companies that do are PepBoys Automotive (Although I've had issues with idiots in the tire department not understanding that...
I would suggest you get advice from a support group or a charity - the help you need depends on what is ailing your mother. You may be able to look after her at home or she may need to be looked...
The most common is Vitamin A. The derivative of this is Beta-cerotine which helps to ad pigment to retina which in turn aids in vision. Other vitamins like E and C will help overall too.