At last you understand my problem ,i asked the divershop guy and he told me that they only have lenses for miopia but tommorow i will visit my eyeglass store to see what they have to say.
How bad's your presbyopia? I have no trouble reading the numbers on my Leonardo, but for me 1.25 to 1.5 readers and a flashlight are good enough for smallest print. So aside from recommending a thousand-dollar computer with a huge colour screen, I doubt anyone can tell you anything really useful. Well, other than reader lenses for your mask.
Keep in mind that in some of them (Leonardo at least), once water gets under the protective plastic, it has magnifying effect. I.e. what you see in the store isn't exactly what you'll see underwater. (That doesn't help, I know.)