Terminology for glasses????????
Posted: Sat Apr 03, 2004 2:28 amI am living in saudi arabia. so here the term use for glasses power is -1 or -2 etc . what does this 20/20 means. 
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Terminology for glasses????????
https://forums.simviation.com/phpBB3/viewtopic.php?f=34&t=96154
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Posted: Sat Apr 03, 2004 2:28 amRe: Terminology for glasses????????
Posted: Sun Apr 11, 2004 7:23 pmperfect vision...if this helps