I dont think that she is leaning that far forward. She is 1.5m away and there is only .22m total DOF (approx 3.4 inches forward and 5.2 back)!She's leaning forward so her knees and eyes are pretty close to being in the same plane. What you're seeing is the drop off in resolution from the frame center (knees) toward the frame edge (eyes).In the sample photos, I looked at the models eyes to gauge sharpness and it appeard that the face is not the point of focus, the knees werereally.
-C