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The top and bottom images produce a dent or projection depending on whether viewed with cross- () or wall- () eyed vergence. An autostereogram is a two-dimensional (2D) image that can create the optical illusion of a three-dimensional (3D) scene. Autostereograms use only one image to accomplish the effect while normal stereograms require two.
Before Your Eyes. Before Your Eyes is a 2021 adventure game developed by GoodbyeWorld Games and published by Skybound Games. It was released on Microsoft Windows on 8 April 2021, followed by a port for macOS in September of the same year. Ports for Android and iOS were released in July 2022. The game is noted for its use of eye-tracking ...
Eye Guess is an American game show created by Bob Stewart and hosted by Bill Cullen that aired on NBC from January 3, 1966, to September 26, 1969. [1] The game combined a general knowledge quiz with a Concentration-style memory element, in which the answers were shown to the players and their recall of their positions was tested.
Tetrachromacy. The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1] Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of ...
Eye examination for visual acuity. Visual acuity is a measure of the spatial resolution of the visual processing system. VA, as it is sometimes referred to by optical professionals, is tested by requiring the person whose vision is being tested to identify so-called optotypes – stylized letters, Landolt rings, pediatric symbols, symbols for the illiterate, standardized Cyrillic letters in ...
Landolt C. Lea test. logMAR chart. An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [1] Eye charts are often used by health care professionals, such as optometrists, physicians and nurses, to screen persons for vision impairment.