Vision disorders are the conditions which cause impairment in the sense of vision. These disorders are often caused by certain eye diseases or structural abnormalities of the eye balls.
Presbyopia is a condition in which the lens in the eye loses its flexible nature causing difficulty in focusing closer objects. It is a part of the natural aging process and usually noticed in the early to mid-40’s and is not preventable. Blurred vision even at the normal reading distance, tendency to hold the book at an arm’s length, eye fatigue, headache are some of the signs of presbyopia.