Would it be wise to request an honorable medical discharge?

There is definite plausible reason to request an honorable medical discharge from the military; dislocated shoulder, glaucoma, and a herniated disk. Being one year away from retiring, there has been a request for the company to deploy to Afghanistan. Considering the physical impairments as well as the posing threats of even more bodily damage, would it be wise to request an honorable medical discharge even if you knew you were going to lose all of your benefits?