I think we are mainly looking for old prescription glasses. Most of the people we will be screening will be kids.
However, I'm sure we will do some adults too. If you have any old glasses, even "cheaters" or "readers", we could use them. The vast majority of the kids needing glasses will require prescription lenses. I'm pretty sure we will have a machine down there to check the prescription of the lenses, but if not, we will try to identify the Rx and label them before we leave.
Several people on the team are optometrists or ophthalmologists.