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An example of the scintillating grid illusion. Dark dots seem to appear and disappear at intersections. The scintillating grid illusion is an optical illusion, discovered by E. and B. Lingelbach and M. Schrauf in 1994. [2] It is often considered a variation of the Hermann grid illusion but possesses different properties. [2] [3]
The Hering illusion (1861): When two straight and parallel lines are presented in front of radial background (like the spokes of a bicycle), the lines appear as if they were bowed outwards. Hollow-Face illusion: The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face.
The shifted region of random dots will appear as a small, central, square area closer to your eyes than the larger, surrounding, rectangular area. The shifted region produces the binocular disparity necessary to give a sensation of depth. A small shift yields a small amount of depth; a larger shift yields a larger amount of depth.
The third pictured, alchemical for black sulfur, is also known as a 'Leviathan Cross' or 'Satan's Cross'. Sun: Alchemy and Hermeticism: A symbol used with many different meanings, including but not limited to, gold, citrinitas, sulfur, the divine spark of man, nobility and incorruptibility. Sun cross: Iron Age religions and later gnosticism and ...
Dual portrait of a black woman and a white woman, identities unknown, circa 1650, by an anonymous hand. The two women, who appear to be of equal standing, are wearing face patches, which were a fashion of the time. The painting is captioned "I black with white bespott y white with blacke this evil proceeds from thy proud hart then take her ...
Fordyce spots on scrotum Fordyce spots on lips. On the shaft of the penis, Fordyce spots are more visible when the skin is stretched, and may only be noticeable during an erection. [8] The spots can also appear on the skin of the scrotum. [8] Oral Fordyce granules appear as rice-like granules, white or yellow-white in color.
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Visual snow: dynamic, continuous, tiny dots observed across the entire visual field at any time of the day, regardless of lighting conditions, persisting for more than three months. The dots are usually black/gray on a white background and gray/white on a black background; however, they can also be transparent, white flashing, or colored.