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Emission theory or
extramission theory (variants: extromission) or
extromissionism is the
proposal that
visual perception is
accomplished by eye beams...
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Optics presented experimentally founded arguments against the
widely held
extramission theory of
vision (as held by
Euclid in his Optica), and
proposed the...
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pages 372 and 408
disputed Claudius Ptolemy's
extramission theory of vision; "Hence, the
extramission of [visual] rays is
superfluous and useless". —A...
- as a
mathematical spatial extension. His
experimental disproof of the
extramission hypothesis of
vision led to
changes in the
understanding of the visual...
- flat and
spherical mirrors. Ptolemy, in his
treatise Optics, held an
extramission-intromission
theory of vision: the rays (or flux) from the eye formed...
- instance, was the
agent of its
lethal power,
given the
technical term
extramission. [citation needed] The
exaggerated eyes of fourth-century
Roman emperors...
- and
emitted or
reflected into the eyes, he
states that
therefore "the
extramission of [visual] rays is
superfluous and useless." He may also have been the...
- 1966) is a
British artist living and
working in London. Her
installation Extramission 6 (Black Maria) was
included in
Nicolas Bourriaud's Tate Triennial, 'Altermodern'...
- to the
medieval debate about whether visual perception occurs through extramission or intromission. Her
second monograph,
Idols in the East (2009), presents...
- and
emitted or
reflected into the eyes, he
states that
therefore "the
extramission of [visual] rays is
superfluous and useless." He may also have been the...
