My eyes are like yours, great at distance but bad up close. I never ride without glasses and all of them have a bifocal reading lens. I do not have a bike computer but I've been challenged using my multi tool to fix a chain, adjust a seat etc. Actually, just changing a tube is nicer with reading lenses. Stopping at a store or reading a menu at the cafe, makes me glad I wear readers. I buy a darker polarized model from a site called "Boomers in the know". I also have a yellow pair for cloudy/rainy days that are just safety glasses with bifocal lenses. Its a little odd as bifocals bother me and I don't like to wear them during the day, but on the bike they're fine.