In my case, this image is a far better fovea detector than the propsed shader. For medical issues (high intraocular pressure), I'm used to doing field of view t

In my case, this image is a far better fovea detector than the propsed shader. For medical issues (high intraocular pressure), I'm used to doing field of view tests, where I have to spot very faint dots of light against uniform backgrounds, and over the years this has resulted in me being used to spotting small variations (either in brightness or movement) in the "outer" part of my FoV. Long story short, I don't see a sharp edge where the stars don't rotate in the shader, but on the "static" image I'm aware that there are dots that I'm not seeing (most I can get to see is 4 at a time by looking at the diagonal crossings).