If you build it, I'll use it. One thing I found interesting in this vein was that there are only a handful of measurements that specify a pair of glasses (like

If you build it, I'll use it. One thing I found interesting in this vein was that there are only a handful of measurements that specify a pair of glasses (like pupil distance) and once you know yours, you can just buy glasses for $8, but very very few people know they can just ask for them so they buy $200 glasses from their optometrist.