Vision Requirements to Fly in the Army

Like the rest, applicants must have normal colour vision and depth perception. Also, vision must be 20/50(correctable with glasses to 20/20) or better in each eye. After the flight training, vision has to be better than 20/400(correctable with glasses to 20/20) to remain on flight status.
Thanks to http://usmilitary.about.com/cs/genjoin/a/pilotvision.htm

Vision Requirements to Fly in the Navy and Marine Corps

Like the Air Force, you must have normal colour vision and depth perception. Before flight training begins, your vision must be 20/40 or better(correctable with glasses to 20/20) in each eye. During flight training, vision must not go worse than 20/100(correctable with glasses to 20/20) in each eye. After flight training graduation, if your vision has dropped to 20/200 or worse, you have to have a waiver for carrier operations. If it gets even worse than 20/400, pilots can only fly aircraft that have dual controls(ie, aircraft with co-pilot).
Thanks to
http://usmilitary.about.com/cs/genjoin/a/pilotvision.htm

Vision Requirements to Fly in the Air Force

First of all , you have to have normal colour vision and depth perception. Next, Your vision must not get worst than 20/70(correctable with glasses to 20/20) in each eye. Fortunately, after flight school, requirements would not be so high. To remain on flight status, your vision must not go beyond 20/400 in each eye(correctable to with glasses to 20/20).
Thanks to
http://usmilitary.about.com/cs/genjoin/a/pilotvision.htm