Ключевые слова: 3d, background, blind, blindness, brain, circle, clear, color, colorblind, colour, daltonism, design, deuteranopia, dots, eye, glaucoma, green, health, hue, illusion, illustration, indication, invisible, medical, monochrome, number, optical, orange, plate, randomized, red, render, retina, see, sense, shade, sphere, test, various, visible, vision, weakness,