I have a rare issue called Intermittent Exotropia in my left eye, which means when I am tired and unable to properly focus my eye will move to the left slightly and I will see double when this occurs. My eye muscle has strengthened enough through my childhood where I can control it, and it only occurs when I am either really tired or trying to focus on something extremely close to my face. Not exactly sure what my vision is, I believe the last time my eyes were tested (a couple years ago) both my eyes were 20/20 and I know my vision has not become worse since then. I am wondering if there are any pilots, or anyone with information that knows if this will affect me at all.
A better explanation on Exotropia: http://www.strabismus.org/intermittent_exotropia.html