Vision is one of our most wonderful and important gifts. In reality, it is not fully developed at birth. Development of the visual process is strongly influenced by the environment. That is, the variety of stimulation available, the demands we face and the problems we must solve in order to use our vision exert powerful influence on the direction our visual development will take. The visual process must continually develop and change throughout our lives to be at its best. Vision is not simply a thing done by the eyes. It is a complex process involving many areas of the brain. An optimally developing visual system enables the visual information processing abilities of acute discrimination, awareness, accuracy and control, with effortless imagery processing to support good memory and anticipation for action. The visual process should show good flexibility, and not be stimulus bound. Development of integration of information with other sensory systems such as hearing, proprioception and vestibular processing, will enable minimal demand on attention resources. As a dynamic process of intake and response, good visual performance must be learned and, if problems arise, can be enhanced and improved with vision therapy and/or lenses.