The Hermann Grid

What I found most interesting in the chapters so far, is the Hermann Grid. Its interesting to know that there really is a reason for seeing "the little gray dots." I've seen this grid so many times, but was never given an explanation as to how it actually works- lateral inhibition. When you look at the boxes, there appears to be a grayish circle in the intersections, which disappears when you look directly at the intersection. I now know that this occurs depending on where certain receptive fields are located and the amount of light being detected by the photoreceptors.

By: Kate McGinley