Which vision problem is matched incorrectly with the description?
options: 1) presbyopia – less elastic lens, far vision is blurred 2) astigmatism – irregular lens or cornea 3) myopia – nearsighted, far vision is blurred 4) hyperopia – farsighted, near vision is blurred
The correct answer and explanation is:
The correct answer is 1) presbyopia – less elastic lens, far vision is blurred.
Explanation:
Presbyopia refers to the age-related loss of the eye’s ability to focus on nearby objects, typically occurring around the age of 40 or older. This condition is caused by the gradual hardening and loss of elasticity in the lens of the eye, making it more difficult to focus on close-up objects. However, presbyopia does not cause blurred far vision. Instead, it primarily affects near vision, making tasks like reading, sewing, or using a smartphone more difficult.
Here’s a breakdown of the other options:
- Astigmatism is caused by an irregular shape of the cornea or lens, which leads to distorted or blurry vision at all distances. This description is accurate.
- Myopia, also known as nearsightedness, occurs when the eye is too long or the cornea is too curved. As a result, light entering the eye is focused in front of the retina, causing blurred vision for distant objects. This is correctly described.
- Hyperopia, or farsightedness, occurs when the eye is too short or the cornea is too flat. This condition causes difficulty seeing nearby objects clearly, but far vision is often clearer. This matches the description of farsightedness and near vision being blurred.
In summary, presbyopia does not match the description provided for blurred far vision. It is primarily an issue with near vision, making it the incorrect pairing in this case.