Headache, concentration. But its normal.

A month ago my mom had a minor laser operation (Rs. 1500) in 1 eye to remove a layer in right eye. After that, her vision got clearer. But since last 2 weeks, she's experiencing difficulty in concentration. She went to same eye doctor now. He suggested to visit ENT specialist. We have not yet visited specialist so far. Meanwhile, she is having headache in her forehead along with difficulty in concentrating on things for longer duration. This also happens when she goes for her regular evening walk at a nearby garden. There sometimes she loses control (like she don't know where is she going) for few seconds while walking, but resumes regular walk again. Few days later the forehead pain has shifted to the back side of the head (inside) It feels like aching (something holding). It is like feeling vibration/heart-beat in the back of the head. Today again the pain shifted to full forehead. We visited a nearby Dr and she said it is sinus problem as my mother has cough problems but its normal.