Filed under: OPTICS | Tags: cognitive illusions, Hermann grid illusion, illusion, optical illusion, percept, photoreceptors, physiological illusions, receptive field, retina, visual cortex, visual illusion, visual perception
‘A scintillating grid illusion. Shape position and colour and 3d contrast converge to produce the illusion of grey dots at the intersections.’ [Wikipedia/Optical illusion]
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Optical illusions
Filed under: OPTICS | Tags: binocular vision, contrast ratio, cornea, fovea, human eye, iris, lens, opthalmology, optic nerve, optical, pupil, retina, visual cortex, visual system
‘The human eye has a 200 degree viewing angle and can see 2.7 million colors. It can also relay an impressive 72 GB of data to the brain every second.’ [Wikipedia/Human Eye]
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Optical
Filed under: OPTICS | Tags: apposition eyes, arthropods, compound eye, convex, diffraction, housefly, insects, ommatidia, photoreceptors
‘A compound eye may consist of thousands of individual photoreception units. The image perceived is a combination of inputs from the numerous ommatidia (individual “eye units”), which are located on a convex surface…’ [Wikipedia/Housefly/Compound Eye]
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Fly Eye
