The ciliary muscle is an involuntary muscle which is part of the middle layer within the eyeball. It is connected to the lens by suspensory ligaments (zonules) and creates movement with the lens, allowing us to focus either near or far. When we focus our eyes on a near object this muscle contracts, rounding the lens. When we focus on a far object, it relaxes, flattening the lens.

Just like any muscle in the body, if we don't use it to its full potential then it will become weak and inflexible. So by fully contracting and relaxing we can train the muscle to become stronger and more efficient at its job ie accommodation (focusing) helping improve eyesight.

Near and Far Eye Exercise Step-By-Step:
1) Remove any corrective lenses i.e glasses and contact lenses.
2) With a soft gaze, without any strain, look into the distance. Choose an object within your view that is the furthest away, for example, the horizon when looking out at the ocean.
3) Now choose an object between you and the furthest object i.e. the waves in our example.
4) Now hold up your finger as close to your nose as possible without strain.
5) Keeping a soft gaze and without any strain, shift your focus from far to middle to near continuously i.e. horizon, waves, finger.
6) Try to play with different variations such as going from far to middle 10 times, then middle to near 10 times or near to far 10 times.

Please note that a lot of us have week ciliary muscles, so take it slow to begin with, paying extra attention to any strain or discomfort. If you find you are straining or feel any discomfort, stop and palm. If you feel as though you can continue, then do so; if not, then stop and come back to the exercise when the eyes are feeling relaxed again. To know more in detail visit, http://www.envisionselfhealing.com/exercises/near-and-far-eye-exercise

I really like how you turned the idea of improving eye sight through exercise. I just add good diet for improving eye sight.  Eat preferably green veggies, fresh fruits, milk for eye sight.