Vision disorders are conditions which cause impairment of vision.These disorders are often caused by certain eye diseases or structural abnormalities of the eye balls.
Hyperopia or farsightedness is a condition in which objects located far can be seen clearly but nearer objects do not come into proper focus. This occurs if the eyeball is too short or the cornea has too little curvature. As a result, the light that enters the eye and the image forms beyond the retina. Some of the symptoms of this condition include difficulty in concentrating and maintaining a focus on near objects, strain in the eyes, fatigue or headache after work, aching eyes, nervousness and irritability.