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L15 : Defects if vision: Myopia; Hypermetropia - Light, Science, Class 8 Video Lecture

FAQs on L15 : Defects if vision: Myopia; Hypermetropia - Light, Science, Class 8 Video Lecture

1. What is myopia?

Ans. Myopia, also known as nearsightedness, is a common vision problem where a person can see nearby objects clearly but distant objects appear blurry. It occurs when the shape of the eye causes light rays to focus in front of the retina instead of directly on it.

2. What is hypermetropia?

Ans. Hypermetropia, also known as farsightedness, is a vision condition where a person can see distant objects clearly, but nearby objects appear blurry. It occurs when the shape of the eye causes light rays to focus behind the retina instead of directly on it.

3. How does myopia affect vision?

Ans. Myopia causes distant objects to appear blurry because the eyeball is too long or the cornea is too curved. This causes light rays to focus in front of the retina instead of on it, resulting in a blurred image. People with myopia may experience difficulty in seeing objects such as road signs or writing on a whiteboard from a distance.

4. How does hypermetropia affect vision?

Ans. Hypermetropia causes nearby objects to appear blurry because the eyeball is too short or the cornea is too flat. This causes light rays to focus behind the retina instead of directly on it, resulting in a blurred image. People with hypermetropia may have difficulty in focusing on nearby objects such as reading a book or using a smartphone.

5. How are myopia and hypermetropia treated?

Ans. Myopia and hypermetropia can be corrected using eyeglasses or contact lenses. These optical devices help to redirect the light rays onto the retina, allowing for clear vision. In some cases, refractive surgery such as LASIK or PRK may be recommended to permanently reshape the cornea and correct the vision problem. It is important to consult an eye care professional for an accurate diagnosis and appropriate treatment options.

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Oct 19, 2025 Last updated

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