Contact lens


 
 
Concept Explanation
 

Contact lens

Contact Lens:

A contact lens is a small lens which is worn directly on the cornea. It has one clear advantage over spectacles. When a person wearing spectacles looks through the corner of the eye, the cornea and the centre of the lens are not in line. As a result, the peripheral view gets distorted. Since a contact lens moves with the cornea, this problem does not arise. Apart from this, some people may prefer contact lenses for cosmetic reasons.

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Sample Questions
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Question : 1

_________ is a small lens which is worn directly on the cornea.

Right Option : C
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Question : 2

Which one of the following is are not true for contact lens

1. Contact lens moves with the cornea

2. Contact lenses are used for cosmetic reasons.

3  They require lesser care than spectacles.

4. They are not required to be stored and cleaned in the prescribed fashion.

5. Improper use and maintenance of contact lenses does not affect the cornea.

Right Option : C
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Question : 3

Which one of the following materials cannot be used to make a lens?

Right Option : D
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