What medical conditions would stop you becoming an astronaut?

[VanMedia]

i wished i could talk to people sideways lmao

[HungryGreeny]

I know you bent your head to the left while watching this video

[TheAwesomeAnoud]

Yeah, that's Frank De Winne! I seriously look up to this guy :D especially cuase he's from Belgium like me :)

[lindz4nicky]

happy xmas my frend

[Electroguy1]

I love that this guy has taken the time to answer this question FROM SPACE no less.....but didn't really answer it.

I think the original question posed was what conditions would prevent someone from becoming an astronaut. Not which medical issues are of concern to astronauts.

If I might mention a few physical prerequisites:

# Height 64 and 76 inches

# 20/70 Corrected to 20/20

# Blood Pressure-140/90

I'd imagine also asthma, hypertension or any psychological illness would rule you out.