Contact lenses for medical purposes
Contact lenses are used to correct the vision problems due to short sightedness or the ‘refractive errors’ of eyes.
Shortsightedness
Shortsightedness is a medical condition in which the patient suffers with poor vision. The patient is not able to see clearly and images appear blur to him. Shortsightedness can occur due to the refractive errors of eyes or due to other medical faults in the eye (such as cataracts).The refractive errors of the eye results in nearsightedness, farsightedness, and astigmatism. Nearsightedness (also called myopia) is a condition in which the far off objects and images do not appear clear while the objects placed near could be seen clearly, while patients with Farsightedness (also called Hyperopia) face problems in seeing closely placed objects clearly. Farsightedness and Nearsightedness both can occur simultaneously too. Astigmatism is another kind of refractive error which occurs in aged persons.
The newer contact lenses are thinner, softer, and easier to be placed on the eye cornea.
Apart from medical uses, contact lenses are also being used to enhance the eye color and sometimes for decorative purposes as well.
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