I figure it out - why I like wearing red lensed specs.
Apart from any implied pose value (as if!)

Whilst sitting in the glorious UK sunshine resting my eyes - all I could see was red eyelids. About the same shade as my current prescription. (distance that is)

Not only am I cool (discuss) - but I feel restful wearing them.

As an engineer it is nice to have a positive function - though I have to say the colour does improve the discrimination with close shades of similar colours - something B&W photographers know well when photoing clouds. Red filters. In daylight fog it can show detail of (say) 200 yards rather than 100 - depending in density.

Anyway - I thought I would share this revelation with you all. The prescription specs can be seen (just about) on cresby.com