contact lense

The definition of contact lense is a corrective (or sometimes cosmetic) lens that is placed in the center of the eye to improve vision or to alter the color of the eyes.

Facts About Contact Lenses

• Contact lenses are made from plastic, and most contact lenses are flexible and are disposable.

• You place the lenses directly over the iris (the colored part) of your eye.
• Contact lenses are curved based on a prescription to influence the light to enter the retina properly.
• Contact lenses stay in place because of the moisture in your eye.
• Leonardo da Vinci is considered the first individual to describe the idea behind contact lenses.
• In 1887, Adolf Gaston Eugen Fick, a German ophthalmologist, was able to construct what is considered the first contact lenses, and he fit them on an individual. They were composed of heavy blown glass and were approximately eighteen to twenty one millimeters in diameter. They did not rest directly on the cornea; rather, they rested on the outside area that surrounds the cornea. If they were worn for longer than a couple of hours, they caused significant irritation in the eyes.