6/6 20/20
6/6 OR 20/20 vision means that the person tested can see at 6 metres what a normal person can see at 6 metres. 20/20 is the old number used and i think it signifies feet instead of meters.
thank you!
P.S: my friend i do feel sorry about your situation but as you are passionate about this field (AVIATION) do not stop now... chase your dream. PM me anytime and i can give you some info.