Science
(a) What is the fundamental difference between hypermetropia and myopia in terms of the optical experience of a person?
(b) What are the causes of myopia in the human eye?
Human Eye
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Answer
(a) Hypermetropia is a defect that causes difficulty in focusing on near objects, with clearer vision observed for distant objects while, in Myopia distant objects appear blurry while near objects are seen clearly.
(b) Causes of myopia in the human eye :
- Elongation of the eyeball : The eyeball becomes too long from front to back, causing light rays from distant objects to focus in front of the retina.
- Excessive curvature of the eye lens : The lens becomes too powerful and converges light rays more than required, forming the image before the retina.
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