Definition of horopter in English:


Line breaks: hor|op¦ter
Pronunciation: /hɒˈrɒptə


A line or surface containing all those points in space of which images fall on corresponding points of the retinas of the two eyes.
More example sentences
  • All the points common to both the horizontal and vertical line horopters have the same direction in each eye.
  • The difference you notice in your ability to read the brochure is caused by the vertical horopter.
  • The experimentally determined horopter deviates from the Vieth-Muller circle and is closer to the objective frontal plane passing through the fixation point.


early 18th century: from Greek horos 'limit' + optēr 'person who looks'.

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