Have you ever wondered about the history of contact lens? How have they been invented? And how do contacts correct vision?
Your vision depends on light beams hitting the retina (the back of your eyeball) at the same point. When the light does not meet at the same point, vision becomes blurred.
To correct this vision problem a lens needs to be placed in front of the eye to compensate. The lens then becomes a ‘perfect’ eye and light beams converge together at the retina.
Even though eye glasses have long provided the needed correction for vision problems, contact lenses were a marvel of science allowing individuals the freedom to forgo the hassle of slipping, fogging and distracting eye glasses. The inside surface of the contact lens is fitted to the shape of your eye so it stays in place. The outer surface is shaped to the corrected curve (as in eye glasses).
Originally, these contacts were made of hard plastic that required saline solution drops on a regular basis to keep moist. They were also prone to ‘popping’ out and causing discomfort when blinking. Newer contacts are made from a soft plastic that allows the eye to...
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