Since you already have the N900, the fact that you're becoming myopic is a dream come true. I've been myopic for many decades, and that makes the N900 ideal for me. You can hold the N900 close to your face and read it very easily. Being myopic means that you are good at reading close up.

So, enjoy it! I do. The only real problem is when you go do things that require seeing things that are NOT close up, you have problems. But as a myopic person, you should have no problem with your N900.