Which of the following is not an essential part of the human eye?
A
Eyelashes
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B
Eyelid
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C
Eyelens
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D
Eyebrow
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Solution
The correct option is D Eyebrow Eyelashses protect the eyes from small dust particles. Eyelid allows rest to the eye and also protects the eye. Eyelens refracts the light in a fashion so that the image is formed on the retina. Eyebrow has no role to play in the working of human eye.