How could I get in the military with bad eyesight?

[Pardee]

My eyes haven't really ever been the best throughout my life time. I'm 16, and my left eye was what they called a "Lazy eye" and now that I've gotten older, it's gotten a lot better. Not perfect, really, but better and sometimes when I'm watching shows or playing games, etc, my left eye would almost come in to focus and I could see part of whatever I'm watching with my left eye. I believe, if I'm right, my left eye is now 20/60 and my right eye is 20/40 or something. I don't think I'll ever be out in the battlefield in say Afghanistan or something, I'd like to be.. But I'm sure it's not that great at all, I just wanna feel like I've done something for my country. Now, me with bad eyesight: What kind of, I guess you'd say, career could I have in the military? Maybe a medic or something? But I don't know anything about that. I don't know which branch I wanna join, either. I've mostly been thinking USMC or the Army. If I had a job in the Army or USMC that doesn't require shooting, etc, could I still rank up and would I be required to take some kind of physical training (I'm pretty sure everyone would have to do that, I'm just making sure what kind of physical training!) and training in firearms? (e.g. Being able to hold maybe a pistol or something for protection if I were at a base in Afghanistan). Also, what kind of eyesight would you need to join the military, anything specific?