THE DIFFERENCE BETWEEN
SIGHT AND VISION

EYESIGHT essentially refers to the physical attributes and performance of the many organic components involved in the visual system. 20/20 vision is a commonly quoted measure of normal vision, yet it simply describes the sensitivity of the eye to see fine detail in the distance.

Unlike eyesight, VISION is a thought process, which emerges an understanding of what is seen, where it is and how to react to it. It combines information from many sensory systems to create a perception of reality. Vision describes a more dynamic and interactive process, essentially a whole information processing system developed through experience to gain understanding of the external visual space world.

For example, in a person driving a car, vision is much more than reading license plates clearly at a distance. Vision is the total process whereby the spatial relationships between the cars are taken in and processed by the driver in order to guide the car safely to its destination, without an accident and with minimum stress. Vision judges the relative speeds of the other cars, and alerts the driver to a pedestrian stepping onto the road or another car at an intersection, or the door of a parked car opening.

Vision is what directs the baseball player to swing the bat at the exact right moment and place in space to make contact and hit a home run.

Some examples of

Eyesight Problems

  • Shortsightedness (myopia)
  • Longsightedness (hyperopia)
  • Astigmatism
  • Presbyopia
  • Hyperopia

Some examples of

Vision Problems

  • Binocular vision problems
  • Lazy eye (amblyopia)
  • Eye turn (strabismus)
  • Eye strain or eye fatigue
  • Colour blindness