is 43.60 KB, has a resolution of 600x600 pixels and was uploaded on October 13, 2018 @ 9:40 pm by user: gabriemas. It is filed under the tags: sky, optics, sphere, visual perception, blue. Click the blue button at the top to freely download: Light Circle Troxler's Fading Visual Perception Optics Optical Illusion Fraser Spiral png.