Fig. 2

The area was divided into four regions, superior nasal (point A1–8), inferior nasal (point B1–8), inferior temporal (point C1–8), and superior temporal (point D1–8). When calculating, the points located on X-axis or Y-axis were excluded. For example, when comparing the retinal sensitivity between superior and inferior retina, the points located on X-axis (point B1,2,3 and D1,2,3) were excluded. In the same way, when comparing the retinal sensitivity between nasal and temporal retina, the points located on Y-axis (point A1,2,3 and C1,2,3) were excluded