The eye defect caused by an uneven curvature of the cornea or lens or both...
BIOLOGY
WAEC 2023
The eye defect caused by an uneven curvature of the cornea or lens or both is
- A. myopia
- B. presbyopia
- C. astigmatism
- D. hypermetropia
Correct Answer: C. astigmatism
Explanation
Astigmatism is a common refractive error of the eye that occurs when the cornea or lens has an irregular shape. In a normal eye, the cornea and lens have a smooth, evenly curved surface, similar to a sphere. However, in astigmatism, the cornea or lens may be more curved in one direction than the other, resulting in a refractive error.
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