Share this entry

horopter Syllabification: ho·rop·ter
Pronunciation: /ˈhôˌräptər/ /həˈräptər/

Definition of horopter in English:


A line or surface containing all those points in space whose images fall on corresponding points of the retinas of the two eyes.
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'.

Definition of horopter in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day innocuous
Pronunciation: ɪˈnɒkjʊəs
not harmful or offensive