I remember reading something a long time ago about something I call poor man's glasses. Basically, regardless of whether you are near or far sighted and don't have glasses you can make one out of paper or cardboard. Cut out glasses with the eye pieces completely covered over. Next poke little pin holes through the eye piece area. You should be able to see with perfect clarity through these holes. It is something about the light rays going in a straight line without the need for focusing. In a pinch [pun], pinching your first finger and thump of both hands and putting them together you can make a small hole to look through where all 4 finger nails touch (simple but difficult to describe in writing). I used to use this technique in elementary school, since I was too self conscious about wearing glasses and my eyes hurt from squinting trying to see the board. Just a little tidbit to consider.
Offered by Steve.
This is also a strengthening exercise. My mom purchased a couple of pairs of glasses made with a solid piece of plastic where the lens should be. There are hundreds of small holes punched in the plastic lenses. The holes in the purchased ones are about a millimeter square. There are rows of them covering the entire face of the surface and they are spaced about a millimeter apart. She wears hers when watching TV to strengthen her eye muscles. She says she can see better with them than with her contacts!
Offered by Leila.