Were they the ones that open in the middle bit (over the nose) before letting them hang on the chain? A little bit old womanish perhaps but then that's probably okey dokey.
For all those fascinated by my magnetic reading glasses, you can find them here: clicreadersuk.co.uk & no to the cynics, I’m not endorsing! 12:31am - 25 Nov 12
I haven't seen SF but from what you describe I think they are the same as worn in one of the CSI programmes by the pathologist (sorry hope that's not too low brow for you )
I think it was only when Larry Grayson started wearing his bins on a chain that most of us blokes realised it was a reasonable thing to do, and to hell with Burgundy with feeling a bit camp...