The aim of this Near Far Focus exercise is as the capability of the eye to focus is essential for good vision. This ability mostly is dependent upon the capability of the different eye muscles to flex and change the shape of the lens whenever required.
Many people find it hard to see close or distant objects. Each one of those problems is an indicator that the eye muscles have begun to lose their flexibility and are no longer able to adjust and re-adjust the shape of the eye lens to quickly shift focus when looking from near to far or from far to near.
A large amount of factors contribute to the deterioration of the eye muscles: aging, poor diet, lack of exercise, smoking and so on . Nonetheless, long|extended|lengthy} periods of uninterrupted eye work (reading, writing, working on a PC, etc ) can also significantly contribute to the accumulation of tension in the eye muscles and degeneration of vision.