Since invented by Adolf Eugen Fick, german physiologist in 1887, contact lenses continue to evolve. Have you imagine this vision aids initially based glass? luckily it’s made of thin plastic that certainly a lot safer. Even we get to not feel there is a foreign object in our eyes.
Not only was the color and the motive was more variable, ranging from clear, patterned basketballs, until the row of words such as: “I love you”. But be careful, the wrong usage or maintenance, can disturb our vision.
Generally, contact lens consists of two types, namely soft contact lenses or soft contact lens (SCL) that can be used to short-term. Daily or weekly or long term and hard contact lenses or rigrid gas permeable (RGP), which can penetrate gas and oxygen. Usually this kind end to the long-term usage.
Each contact lens has advantages and disadvantages of each, if the SCL, the excess is convenient to use because a lot of water content but on the other hand, this type of contact lenses may absorb tears. Though tears contain more protein, so that vulnerable place a deposit (protein buildup) in the lens.
In contrast to the RGP, because the eye doesn’t absorb water, is more durable contact lenses can be worn for longer periods. But unlike the SCL, to feel comfortable using one type of contact lens is the eye we need a longer adaptation, about eight days.
