Question

A defect in our eye in which some parts of the object are in focus while the other parts are blurred.

Hint:

Astigmatism is a common refractive error and can often be easily corrected with corrective lenses or surgery.

Answer 1

Step 1: Define the Defect.
This condition is known as {astigmatism}. Astigmatism occurs when the curvature of the cornea or lens of the eye is irregular, causing light to focus on multiple points instead of a single point on the retina.
Step 2: Cause of Astigmatism.
In a normal eye, light is refracted evenly to focus on a single point on the retina, creating a clear image. However, in an eye with astigmatism, the irregular curvature of the cornea or lens causes light to be focused at multiple points, leading to blurred vision, especially for objects at certain distances.
Step 3: Symptoms and Correction.
People with astigmatism may experience blurred vision, eye strain, and headaches. The condition can be corrected with eyeglasses, contact lenses, or surgery, depending on its severity.