Which statement about astigmatism is true?

Which statement about astigmatism is true?

• A. It is caused by aging.
• B. It affects only color vision.
• C. It is corrected by simple glare reduction.
• D. It is a condition where the eye does not focus properly because of uneven corneal curvature, causing blurred vision at all distances.

Answer: (D)

Astigmatism happens when the eye’s front surface (the cornea) doesn’t have a perfectly even curvature. Because the curvature varies in different directions, light rays don’t come to a single sharp focus on the retina. Instead, you get two focal points or a smeared focus, which makes vision blurry or distorted at all distances. This isn’t caused by aging alone, and it isn’t about color vision. Reducing glare won’t fix the blurred image because the root issue is the uneven shaping of the cornea (or sometimes the lens inside the eye). The typical fix is corrective lenses with cylindrical power (toric lenses) that balance the uneven curvature, or, in some cases, refractive surgery to reshape the eye.

Astigmatism happens when the eye’s front surface (the cornea) doesn’t have a perfectly even curvature. Because the curvature varies in different directions, light rays don’t come to a single sharp focus on the retina. Instead, you get two focal points or a smeared focus, which makes vision blurry or distorted at all distances.

This isn’t caused by aging alone, and it isn’t about color vision. Reducing glare won’t fix the blurred image because the root issue is the uneven shaping of the cornea (or sometimes the lens inside the eye). The typical fix is corrective lenses with cylindrical power (toric lenses) that balance the uneven curvature, or, in some cases, refractive surgery to reshape the eye.