The things you find online!
I recently came into the market for a pair of sunglasses when mine got ingloriously run over by a car. Having trouble finding what I wanted I turned to the net to see what was on offer and found Ray Ban has on their website a 'virtual mirror' where you an try on the sunnies in their range. I was a tad sceptical, but had a bit of time to kill so tried it out.
I've since tried all the glasses in their range, partly for laugh value, but it's a seriously cool tool and worth a look. Now I have no ties with Ray Ban and I'm not sure how long this has been operational, but it's worth a look. (Of course you need a camera on your computer).
Check it out: HERE.