In article 3752c192-9e96-46b5-bbbf-c4dca6ce8700
@i76g2000hsf.googlegroups.com, says...


Speaking of which, you know the pathologist on one of the CSIs who has
a pair that snap together? How do they work? Magnets? The action is
always too fast on the screen to make out what happens.

Neodymium magnet, see
http://www.glassesdirect.co.uk/relea..._30000065.html

Haven't tried them myself - I go for their cheaper types. Are they
compass safe? :-)
--
John W
To mail me replace the obvious with co.uk twice