I didn't think you could withdraw an FSA, I thought they were use it or lose it. Though I think now you can carry over $500.
I also don't know if you can buy a first aid kit anymore- I thought over the counter stuff was now only with doctor's prescription (because I USED to go stock up on band-aids, pepto, advil, etc.)
Do you have a current glasses prescription? Because if you do, you could always go get the prescription sunglasses elsewhere.
Or, if the money is really use it or lose it- how about a different optometrist? I've been pretty happy with Walmart, quite honestly.
You could go get acupuncture or see a chiropracter.