In reply to IanF:
Another vote for CU belay glasses. And the After Sales/Customer Service is 100%. The two chaps that sell these glasses do so on-line to keep the costs as competitive as possible which is why you won't see them in the shops.
My apoligies to CU belay glasses if this is inaccurate.
I got a pair for christmas because I was suffering from neck pain when at indoor walls. Turns out that I have quite a serious neck problem which is ongoing.
Due to my neck condition which include a few prolapsed disks and other such nasties I have pain extending my neck and these glasses are a real boon.
The optics are first class. There are no mirror images to confuse the brain and the colours and scene presented before you are not altered in any way to further confuse your brain.
If you need to consider these glasses then I'm guessing that you have neck pain.
If the cost is a bit expensive then have a think about how much a Sports Physio costs to relieve neck and back pain from muscle problems. Three trips to a physio will cost about the same as these glasses.
Climbing is a big part of my life, and I'm guessing quite high on your social and fitness agenda too. I would rather spend my money on a quality product that relieves neck pain and gives me the best peripheral vision while keeping my partner safe while climbing.
Sadly I am not able to climb this year, and will probably go under the surgeon's knife later this year. I am really glad that I have my CU glasses ready and waiting for when I can go back out to play, because I really will need them then.
The CU belay glasses really are a quality product, and if you can get a chance to try a pair out, jump at the chance.