horoptern.
/hɒˈrɒptə/ Optics.
A line or surface containing all those points in space, of which images fall on corresponding points of the two retinæ; the aggregate of points which are seen single in any given position of the eyes.
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the world > physical sensation > sight and vision > thing seen > [noun] > horopter or fixation point
horopter1704
fixation-point1890
1704 J. Harris Lexicon Technicum I Horopter, in Opticks, is a Right Line drawn thro' the Point of Concourse, parallel to that which joyns the Center of the Eye[s].
1876 J. Bernstein Five Senses vii. 135 The imaginary figure in space, in which all points are seen single, is called the Horopter.
1877 M. Foster Text Bk. Physiol. iii. ii. 389 For any given position of the eyes there exists in the field of vision a certain line or surface of such a kind that the images of the points in it all fall on corresponding points of the retina. A line or surface having this property is called a Horopter.
Derivatives
horopteric adj. /hɒrɒpˈtɛrɪk/
/hɒrɒpˈtɛrɪk/ΘΚΠ
the world > physical sensation > sight and vision > thing seen > [adjective] > horopter
horoptery1876
horopteric1881
1881 J. Le Conte Sight 99 This circle has been called the horopteric circle of Muller.
1881 J. Le Conte Sight 210 The increasing inclination of the horopteric line with increasing nearness of the point of sight.
hoˈroptery adj. pertaining to or forming a horopter; horopteric circle, the horopter.
ΘΚΠ
the world > physical sensation > sight and vision > thing seen > [adjective] > horopter
horoptery1876
horopteric1881
1876 J. Bernstein Five Senses vii. 136 For other positions of the eye complicated Horoptery figures have been constructed.
This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2022).
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n.1704