Question:
When do we say that a particular person is suffering from hypermetropia? List two causes of this defect. Name the type of lens used to correct this defect.
When do we say that a particular person is suffering from hypermetropia? List two causes of this defect. Name the type of lens used to correct this defect.
Updated On: Dec 20, 2024
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Solution and Explanation
A person is suffering from hypermetropia (also known as farsightedness) when they can see distant objects clearly, but have difficulty focusing on nearby objects. This occurs when the image of a nearby object is formed behind the retina, making close objects appear blurry.
Two causes of hypermetropia:
• Shortened eyeball: The eye is too short from front to back, causing the image to form behind the retina.
• Weakened eye lens: The eye’s lens is not curved enough to bend the light rays properly, leading to the image being focused behind the retina.
The type of lens used to correct hypermetropia is a convex lens, which helps to converge the light rays and focus them on the retina.
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