Illusions regarding contrast and colour are primarily because of the way the retina's rods and cones course of action info by means of their receptive fields. → وَهْمٌ iluze illusion Illusion παραίσθηση ilusión illuusio illusion iluzija illusione 錯覚 환각 illusie illusjon iluzja ilusão иллюзия illusion ภาพลวงตา yanılsama ảo tưởng https://www.youtube.com/watch?v=snr3is5MTiU