I have found a place called New Eyes for the Needy. They use vouchers to get both exams and eyglasses, but you have to find a case worker, etc. to help you by speaking up for you and filling out the paperwork because of so many people needing them. It is a little hassle. But it is still free for those in real need.
Also I found a place [http://www.eyebuydirect.com] that you can get your eyeglasses for very cheap compared to getting them in a regular eyeglasses shop... you must have your prescription which, if you are disabled, medicaid should pay all but about $15 of that so that you can possibly afford the exam. Even then, it should be somewhat easier to get someone like a local Christian congregation to help you with both the reduced cost of the exam, as well as the extremely reduced cost of the frames/lenses combo being produced for you. I am disabled, as well, and could not afford to get my glasses at a regular eyeglasses shop. My medicaid paid all but $14 of the exam, but I have to pay for the frames/lenses combo, but this place is a lot cheaper than anything else I could find and they produce all kinds from classic to designer combos plus Rx sunglasses, as well.
The free/voucher program can be found on the web page at
http://www.neweyesfortheneedy.org , and the discounted frames/lenses combo is found at
http://www.eyebuydirect.com . I hope this helps anyone that is in need like me or worse.