Essay --

Many people require eyeglasses because they may have farsighted or nearsighted vision. While eyeglasses where made in the early twelve hundreds and the inventors were anonymous, they did a lot of justice for many people all over the world. These inventors were able to help others live a better quality of life, because their vision had been made better. When you have strong vision you are more independent and able to function without assistance, but when your vision is week you may need assistance. You may need assistance with driving, with getting a job, and you may need assistance moving safely when in unknown surroundings. The eye is a key function to the body; therefore it is important to visit the eye doctor or Optometrists on a yearly basis to determine if new lenses are required. In order to create new lenses a doctor must have an optical instrument or Surface Machine to produce high-precision measurements and he must use a high quality glass. The convex lens is used to correct hyperopia or farsighted vision. It is a lens that is thicker in the middle than at the edges. In or...