I have just gone through the process and it is nothing like an FAA medical. The first step is the MEPS. This is where they send everyone regardless of your branch of job. You will spend an entire day getting basic vision, blood, hearing, and urine tests. 99% of the other people there are not looking to fly. For me about 90% were enlisting in the Marines or Army, only 10% where looking for a commission, and I was the only pilot. For pilot applicants, it is almost completely useless. It is nothing more than a basic physical that last all day because there are many people the examiners have to go through. As long as you have no major problems, you will get through MEPS with no problem. Just realize that passing MEPS in no way means you pass your flight physical. MEPS tests the same thing as your flight physical pretty much, but to much lower standards. The MEPS is designed to see if you are fit for military duty, not specifically flight duty.

After that, you will wait until you get a commission to be a pilot (assuming you applied to be one). If you do get one, you have to return to the MEPS again where you wait all day for a doctor to ask you if anything has changed since the last time you were there. You answer no and then you wait for the flight physical. For your flight physical, they will test mostly the same things as the MEPS, but to a higher standard and more in depth. Some of the testing includes measurements of your body in a seated position to make sure you will fit in a cockpit, numerous blood pressure readings (over 10 for me), every vision test under the sun, a dental examination, and a hearing test to name a few.

If you would like detailed information on the MEPS or the flight physical, let me know. I have just finished this process so everything is still fresh in my head.