Your friend is having eye sight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as non-uniform and distorted. The doctor diagnosed the problem as :

Solution

Physics sir · 3 steps

Read the two symptoms separately: one tells you the range, the other tells you the shape of the cornea.

1. Distant object blurred. The far-away mesh looks blurred to her. Trouble with distant objects is myopia (short-sightedness): the image of a far object forms in front of the retina.
2. Mesh looks distorted. A uniform mesh has vertical and horizontal lines. If the cornea curves more in one plane than the other, lines in one direction focus sharply while lines in the other stay blurred, so the uniform grid looks uneven and distorted. That is astigmatism.

   Defect	Main symptom	Matches here?
   Myopia	Far objects blurred	Yes, distant mesh not sharp
   Hypermetropia	Near objects blurred	No
   Presbyopia	Near vision fades with age	No
   Astigmatism	Lines in one direction sharp, others blurred	Yes, mesh looks non-uniform

3. So. Both symptoms are present, so the diagnosis is myopia with astigmatism, option (b).

The idea to keep. Match each symptom to its own defect. Blurred far objects means myopia, blurred near objects means hypermetropia, and a grid looking distorted means astigmatism.

Answer from the NTA final answer key. Solution by PrepWiser.