This Instructable entry for the Mash-Up contest will tell you how to combine your reading glasses with an LED light source. You can build it cheaply and with extreme ease. Now you can read papers in the dark or in poor light!
Step 1: Materials
(1) LED in red to maintain night vision- around $0.20 each
(1) roll of strapping tape- around $2.00 a roll
(1) pair of glasses- can be sunglasses
(1) CR2032 3V Lithium Batteries- around $0.25 each
Step 2: Constructing the LED
First you tape one of the LED wires to the battery (the longer wire goes to +, the shorter wire goes to the -) and let the other side stay free and not touching the battery. Make sure the wires are touching the proper sides of the battery because it will short circuit.
Step 3: Conecting the Glasses and the LED
Now you tape the battery and the connected wire to the side of the glasses. Be sure to leave part of the battery showing on the side the loose wire would touch.
Step 4: Working the LED
To work the light, all you have to do is press the loose wire onto the exposed battery and the LED will light up for as long as you press the wire. To shut it off you just stop pushing the wire onto the battery and make sure the two aren't touching.
Step 5: Variations
You can do the same process with another battery and LED on the other side.
I chose a red LED so as not to spoil my night vision if I use it in the dark. You can use any color LED if you choose.