I don't know what you have in your are but try going into a store where you can see them. I have the Nook and I love both of them and you can make the fonts pretty large. Barnes and Nobles carries them in the stored and online but I know you can get them other places as well. I think you should check them out before buying because they aren't all alike and won't all display alike. Good luck and I'm sorry about your sight.
I just wanted to add that you could also consider getting a netbook; a small laptop. Most of the ereaders have free ereaders for the laptops that you can download and it's not to big to carry with you and it's cheaper than an Ipad. You can use more than one ereader like from Sony, Nook, Kindle, etc.
Last edited by romanojg; 06-30-2012 at 06:18 AM.