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In the physics inherited from Aristotle an eye beam generated in the eye was thought to be responsible for the sense of sight. The eye-beam darted by the imagined basilisk, for instance, was the agent of its lethal power, given the technical term ''extramission''. The exaggerated eyes of fourth-century Roman emperors like Constantine the Great (''illustration'') reflect this character.〔L. Safran, "What Constantine saw: reflections on the Capitoline Colossus, visuality and early Christian studies" ''Millennium 3 (2006:43-73), noted in Paul Stephenson, ''Constantine, Roman Emperor, Christian Victor'', 2010: notes 333.〕 The concept found expression in poetry into the 17th century, most famously in John Donne's poem "The Extasie." Later in the century Newtonian optics and increased understanding of the structure of the eye rendered the old concept invalid, but it was revived as an aspect of monstrous superhuman capabilities in popular culture of the 20th century. The emission theory of sight seemed to be corroborated by geometry and was reinforced by Robert Grosseteste.〔B.S. Eastwood, "Mediaeval Empiricism: The Case of Grosseteste's Optics" ''Speculum: A Journal of Mediaeval Studies'', 1968.〕 In Algernon Swinburne's "Atalanta in Calydon" the conception is revived for poetic purposes, enriching the poem's pagan context in the Huntsman's invocation of Artemis: Hear now and help, and lift no violent hand, In T.S. Eliot's rose garden episode that introduces "Burnt Norton" eyebeams persist in the fusion of possible pasts and presents like unheard music: The unheard music hidden in the shrubbery The New Zealand poet Edward Tregear instanced "the lurid eye-beam of the angry Bull"— Taurus of the zodiac— among the familiar stars above the alien wilderness of New Zealand.〔Quoted in K. R. Howe, "The Dating of Edward Tregear's 'Te Whetu Plains', and an Unpublished Companion Poem" ''Journal of New Zealand Literature'' 5 (1987:55-60) p. 58.〕 In computer graphics, the concept of eye beams is fruitfully resurrected in ray tracing (in which the bouncing of eye beams around a scene is simulated computationally). ==See also== Emission theory (vision) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Eye beam」の詳細全文を読む スポンサード リンク
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