Myopia or Nearsightedness
Aristotle (384-322 BC) is credited with the first observation of
myopia as a visual condition. Galen created the term myopia from
Myein (to close) and pos (eye) as he observed
individuals with myopia close the eyes (squint) to see better.
In order to understand Myopia, one must understand basic eye
physiology. Light is reflected off objects and enters the eye
through several lens-like elements that bend, or refract, the light
rays. The purpose of the bending of the light rays is to focus them
on the light-sensitive tissue in the back of our eyes, the Retina.
When light rays reflected off an object we look at are focused on
the Retina properly, the object will look clear to us. If the light
rays are bent too much, they will focus to a point in front of the
retina and spread out again by the time they reach the retina. The
result is a blurred Retinal image. Myopia, or Nearsightedness,
occurs when the refractive power of the eye focuses light to a point
before reaching the retina |