Dyslexia and Irlen Syndrome.

Jelqing. Along the path, the distinct difference of these two colors become is not there. So long as the gray is nearer to white, our society could pass it off as white.

The indication of Irlen Syndrome is the reader bitching of the text moving around on the page. It is named after Helen Irlen who first analyzed it in the 1970s.

This implies they don't work like two digicams, faithfully broadcasting a signal from each rod and cone in each retina. Particularly, the neural circuits are set up to identify change of power across a patch of the retina. If a colored film is laid over the page it changes the contrast. When we see stuffs around without an owner, we simply claim possession of the item.