Identify the key symptom

The person is not able to see clearly a distant object (the window mesh is distant), so there is a defect related to distance vision.

• Difficulty in seeing distant objects clearly $\Rightarrow$ Myopia.

Interpret the distortion of the mesh

A uniform window mesh appears non-uniform and distorted. This means the image is not just blurred; different lines/directions are being focused differently.

This is the characteristic symptom of Astigmatism.

• In astigmatism, the eye has unequal curvature in different planes.
• Hence horizontal and vertical lines may not be seen equally clearly.
• A regular grid or mesh may appear distorted or uneven.

Combine both observations

The symptoms together indicate:

• Myopia: distant object not seen clearly
• Astigmatism: uniform mesh appears distorted/non-uniform

Therefore, the defect is $\boxed{\text{Myopia with Astigmatism}}$

Check options

• A: Astigmatism only explains distortion, but not specifically difficulty in seeing distant objects.
• B: Myopia with Astigmatism explains both symptoms. ✅
• C: Presbyopia with Astigmatism presbyopia affects near vision, usually in old age; not suitable here.
• D: Myopia and Hypermetropia does not explain the distortion of mesh.

Final answer

$\boxed{\text{B: Myopia with Astigmatism}}$