My dear MIL has lost most of her vision due to diabetic retinopathy. She uses a special pair of glasses: Eschenback Max TV glasses when she crochets. She is able to read large print with these glasses. They are available on eBay. Don't know if these will help you, but I thought I'd mention them.
I have an Accuquilt Go Baby, limited to cutting sizes (under 5"), but I love it.
Good luck!