A man is wearing glasses of focal length 1m. what can be the defect in the eye?

Question

Answer

Means men is wearing a convex lens. So he has Hypermetropia defect in his eyes.

I hope it's helpful for us

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Hypermetropia......  because it is in positive....

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Hypermetropia

Because +ve power

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Hypermetropia defect in his eye. Hope this helps you..

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He is having Hypermetropia as focal length is 1m.
the correction for hypermetropia is convex lens.

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The defect in eye is longsightedness or hypermetropia because:

• since f=1m, therefore,near point is more than 25cm
• focal length is positive

Answer

Defect in the Eye:

There are several possible defects that can occur in the human eye. In the case of a man wearing glasses with a focal length of 1m, one potential defect could be myopia, also known as nearsightedness. Myopia is a refractive error that causes distant objects to appear blurry, while close-up objects remain clear.

Explanation:

Myopia:
Myopia occurs when the eyeball is too long or the cornea (the clear front surface of the eye) is too curved. This causes the light entering the eye to focus in front of the retina, instead of directly on it. As a result, the images formed on the retina are blurry, leading to difficulties in seeing objects that are far away.

Consequences of Myopia:
Myopia can have several consequences, including:

1. Difficulty seeing distant objects clearly.
2. Squinting or straining to see distant objects.
3. Headaches or eyestrain, especially after prolonged periods of focusing on distant objects.
4. Impaired vision in low-light conditions.
5. Increased risk of developing other eye conditions, such as glaucoma, cataracts, or retinal detachment.

Treatment for Myopia:
To correct myopia, individuals may need to wear glasses or contact lenses with a negative (concave) lens. These lenses diverge the incoming light rays before they reach the eye, allowing the images to be focused properly on the retina. In the case of the man wearing glasses with a focal length of 1m, the glasses act as a corrective measure to compensate for the eye's myopic condition.

Conclusion:
Wearing glasses with a focal length of 1m suggests that the individual has myopia, a common refractive error that causes distant objects to appear blurry. Understanding the nature of this defect and its potential consequences is crucial for appropriate corrective measures to be taken, such as wearing glasses or contact lenses with a negative lens to correct the focal point of incoming light. Regular eye examinations and consultation with an eye care professional are recommended for proper diagnosis and management of any visual defects.

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