It would be a monumental task to discuss all available low vision aids as well as photograph them. First of all, distance vision improvement can be obtained through the use of a telescope. Early telescopes consisted of holding two lenses a certain distance from each other to produce simple magnification. Altering the power of the lenses and enclosing them in a case allowed telescope makers to obtain various magnifications. Focusing allows a different viewing distance to be clear at each setting.
Telescopes can be simple as well as complex.
In general, the stronger the power of the telescope, the larger and clearer the image and the smaller the area that is viewed. Telescopes can be hand held and come in various shapes and sizes. They can also be clipped-on to a pair of glasses for a versatile approach. For a more permanent aid, they can be mounted directly into a pair of glasses. Figure 1 shows a hand-held telescope.