Can i join the united states marine corps?

ok well im 20 and no where in life really... ever since i was younger i wanted to be a marine, never ever even though of any other branch. i love the marines. when i was younger i was involved in a knife accident which left me blind in my right eye and as far as i know it cant be corrected. also i have athsma and use a inhaler everyday but if i got in better shape i know i could stop the use of it everyday. ive had athsma ever since i can remember but i have not had a athsma attack since i was like 6 or so.... so i was wondering if these thing are going to keep me out of the military... i cant explain how bad i wanna be apart of something so big.