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Convex lenses correct....

Convex lenses correct.

A

Presbyopia

B

Myopia

C

Hypermetropia

D

Glaucoma.

Text Solution

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The correct Answer is:
### Step-by-Step Text Solution 1. **Understanding the Question**: The question asks about which condition can be corrected using convex lenses. 2. **Identifying the Options**: The options provided are presbyopia, myopia, hypermetropia, and glaucoma. 3. **Analyzing Presbyopia**: - Presbyopia occurs typically after the age of 40 due to the loss of elasticity in the eye lens. - This condition affects the ability to see nearby objects clearly. - It is generally corrected using bifocal lenses, not specifically convex lenses. 4. **Analyzing Myopia**: - Myopia, also known as short-sightedness, occurs when the eyeball is elongated. - In this condition, images are formed in front of the retina. - Myopia is corrected using concave lenses, not convex lenses. 5. **Analyzing Hypermetropia**: - Hypermetropia occurs when the eyeball is shorter than normal. - This leads to images being formed behind the retina. - Convex lenses are used to correct hypermetropia as they help focus light rays onto the retina. 6. **Analyzing Glaucoma**: - Glaucoma is a disorder characterized by damage to the optic nerve, leading to blindness. - It is not corrected by lenses but requires medical treatment. 7. **Conclusion**: The only condition that can be corrected using convex lenses is hypermetropia. ### Final Answer The correct answer is **hypermetropia**. ---
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