horopter (plural horopters)
For any system of binocular vision, a three-dimensional curve containing all points from which the light will converge into a single image.
• Prothero
Source: Wiktionary
Ho*rop"ter, n. Etym: [Gr. (Opt.)
Definition: The line or surface in which are situated all the points which are seen single while the point of sight, or the adjustment of the eyes, remains unchanged. The sum of all the points which are seen single, while the point of sight remains unchanged, is called the horopter. J. Le Conte.
Source: Webster’s Unabridged Dictionary 1913 Edition
2 April 2025
(adjective) secret or hidden; not openly practiced or engaged in or shown or avowed; “covert actions by the CIA”; “covert funding for the rebels”
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