Last year I discovered that windy winter weather and contact lenses are not a good mix. I have been wearing glasses daily, but my beloved LAEyewear frames (bought in 2007) are on their last leg and I have been trying to replace them since summer.

I am having a tough time finding an exact size replacement in a style I like, so I am expanding my search to include other sizes. I have been to three different opticians to be fitted; every one has given me a different "ideal" frame size measurement.

If I use measurements of my current pair (47-17-140) to narrow down selection of new frames, does it matter if I move up or down by a mm or two in the lens? Does the bridge size need to stay at 17 to keep them from slipping?

Thanks in advance for any tips. I can't bear to drive into the city this close to Christmas, and I've exhausted the selection in my dinky suburb.