optical illusion Definition

illusion, geometrical, geometric, symmetry, spherical, pareidolia, equilateral triangle, curvature, zoetrope, isosceles triangle, oblique angle, curved, inkblot, parallax, binocular vision, apparition, zodiacal light, iridescence, camera obscura, artificial, armillary sphere, concave, optical phenomenon, fractals, earthshine, illusionary, tetrahedron, epsilon aurigae, relativity theory, incongruence, hyperbolic geometry, vortices, silhouette, elongated, imaginary, ellipse, tinkertoy, einsteinian, unidentified flying object, cubistic, sfumato, contrail, polyhedrons, mirrorlike, foreshortening, celestial mechanics, doppler effect, antigravity, mirage, oddity, sundog, coriolis effect, hologram, fallacy, parabola, wavelike, updraft, refracting, mosiac, ingenious, stereopsis, striations, cherenkov radiation, asymmetrical, iridescent, sculptural, ovular, precognition, starlike, tininess, undulating, horizontality, orb, eggbeater, spirograph, elliptical, translucent, trapezoids, annular eclipse, infinity, convex, bejan, auxetic, parallelogram, wavy, aberration, prolate, unexplainable, gravitation, escher, sine curve, convex lens, rectangular, holograph, kirlian photography, artifical, apatosaurus, dimensional, pendulums, undulation,