Yes i own this model and i can say this is a great GPS. I dont know if this would work with your eye sight. I think this might be something you will need to just try out. The size of the numbers on my setting are about a 1/4" in size. I hope this helps, if not just disregard. As far as charging I use the solar charger(link attached)
http://www.brunton.com/product.php?id=280