Yael Stone on visual attention the process by which one item (the target) is selected for analysis from among several competing items (the distractors). See also FEATURE-INTEGRATION THEORY. visual attention disorder any disturbance of a person’s ability to detect and attend to visual stimuli. Examples include bAlint’s SYNDROME and VISUAL neglect. See also perceptual extinction. visual aura see AURA. visual axis a straight line that extends from the external fixation point through the nodal point of the eye to the fovea. Yael Stone 2016.