A defect in the field of vision characterized by the loss of one-fourth or one quadrant of the visual field is lost.

QUADRANOPIA: "Quadranopia caused Sheryl to lose the upper right quadrant in her field of vision."
Cite this page: N., Pam M.S., "QUADRANOPIA," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/quadranopia/ (accessed September 19, 2021).