McGilli 1 Posted May 22, 2018 I haven't opened these yet - so I'm just wondering what the circle with the line through it vertically means? It's not on all of the glass, just some of them.... Thanks. Share this post Link to post Share on other sites
EBB 25 Posted May 22, 2018 21st letter of the greek alphabet? also maybe: In Lacanian algebra, Φ stands for the imaginary phallus and also represents phallic signification; -Φ stands in for castration Share this post Link to post Share on other sites
McGilli 1 Posted May 22, 2018 4 minutes ago, EBB said: 21st letter of the greek alphabet? also maybe: In Lacanian algebra, Φ stands for the imaginary phallus and also represents phallic signification; -Φ stands in for castration Gee man... I don't know... It just doesn't sound right.... Share this post Link to post Share on other sites
Pseudorep 3 Posted May 22, 2018 It’s the symbol for optical power. It’s related to the curvature of the lens and the refractive index. Share this post Link to post Share on other sites
Luxuracer 14 Posted May 22, 2018 47 minutes ago, McGilli said: I haven't opened these yet - so I'm just wondering what the circle with the line through it vertically means? It's not on all of the glass, just some of them.... Thanks. Those with two number 4.5x5.5 are 'rectangular oval' ... 4.5mm x 5.5mm Those with Φ symbol are round ... Φ5,5 .... round 5.5mm diameter Share this post Link to post Share on other sites
McGilli 1 Posted May 22, 2018 23 minutes ago, Luxuracer said: Those with two number 4.5x5.5 are 'rectangular oval' ... 4.5mm x 5.5mm Those with Φ symbol are round ... Φ5,5 .... round 5.5mm diameter Ahhh right! Of course... with only one measurement - it has to be round. Thanks! Share this post Link to post Share on other sites
Luxuracer 14 Posted May 22, 2018 1 hour ago, EBB said: Φ stands in for castration How did I miss this !?! Share this post Link to post Share on other sites
McGilli 1 Posted May 22, 2018 1 hour ago, Pseudorep said: It’s the symbol for optical power. It’s related to the curvature of the lens and the refractive index. Share this post Link to post Share on other sites