The definition of vision impairment by the Centers for Disease Control and Prevention (CDC) says a visually impaired person’s eyesight cannot be corrected to a “normal level”.It may be said that visual impairment is the functional limitation of the eye or eyes or the vision system. This leads to (1-5) –Loss of visual acuity and inability of the person to see objects as clearly as a healthy personLoss of visual field meaning inability of an individual to see as wide an area as the average person without moving the eyes or turning the head.Photophobia – inability to look at lightDiplopia – double visionVisual distortion or distortion of imagesVisual perceptual difficulties or difficulties of perceptionOr any combination of the above features