I'm not sure what your skills are like...but here's something I wish people would get going somehow.
You know how there are these "readers" that you buy cheap at the wall-marts and targets of the world? These are really cheap prescription glasses for reading and close up activities.
The issue, however, is that there are no "drivers" or something analogous for people who only use glasses for driving and things far away that are in the same section. There are cheap prescription glasses available on the internet for those who are near sighted (e.g.
Eyeglasses Online - Buy Prescription Glasses & Eyeglass Frames | Zenni Optical). But for whatever reason, they don't make it into the Targets and Wal-Marts of the world.
I ran into an issue yesterday, where the glasses I have been wearing for 6 years finally broke when I pushed them up slightly to rub my eyes. I wasn't home. I was in a shopping complex, and needed to be at an appointment rather soon. I went and bought a repair kit, but none of the pins would go through all the holes needed for repair. I had to get someone to use a paper clip they had to bind my glasses back.
Now, if I want glasses quickly, I'll have to go to one of these optometrists and get expensive ones. Or if I order the cheap ones off the internet, I have to wear my paper-clipped version for a while. It'd be nice to get the same option as what happens for far-sighted people when they loose their reading glasses.
I should mention that this also has a huge market in China, where for some reason near-sightedness is very prevalent (or at least perceived by the buying public to be so).
Again, I am not sure what your skills are, but it seems to me the task would be to create distribution channels between the cheap eyewear makers to the big name grocery stores.
One possible business model would be to start of in a similar way that local growers get produce into big super-markets. Find out how that's done, and replicate it for glasses. Or find out how the readers are distributed and replicate that. The challenge in this model would be to provide a guaranteed volume of sales to the manufacturers, while establishing some sort of discount, or some incentive for Targets and Wal-Marts to carry the glasses.
Another possibility is to convince lens crafters, zenni optical, and others to make "pre-made" prescription glasses, and guarantee buying them, and going to a local mall, and setting up one of those carts (like where they sell cell phones and jewlery). This is, of course, higher financial risk for you personally. The challenge will be to somehow get it to be know that cheap eye ware is available at your stand.
There are plenty of other possibilities, I am sure.
Again, I don't know if this is something you'd want to do, or are well prepared to do, but I think there is at least a small need for getting cheap eye-wear (for the near-sighted especially), without having to order it over the internet.