county rules and regulations

Does anyone know if there are medical rules or regulations for county level as far as what inmates are entitled to re: eyeglasses, etc. I have been told to just follow the D.O.C. but obviously a county cannot follow those rules due to available funds. I have an inmate who reads 13 books in a 2 wk period, yet claims he can't see. Since I advised him he could see well enough, he claims he is going to sue. There must be some rules somewhere that apply to county level.