PPRuNe Forums - View Single Post - Curious.
Thread: Curious.
View Single Post
Old 21st May 2012 | 12:38
  #8 (permalink)  
thing
 
Joined: Sep 2006
Posts: 3,113
Likes: 2
From: 23, Railway Cuttings, East Cheam
that 20:20 vision means you can read letters 20mm high from 20 ft.
A curious mix of measurements. Mind you, aviation is full of them so hardly surprising that opticians mix them up as well.
thing is offline  
Reply
0