Visual perception of upright: Head tilt, visual errors and viewing eye.

ABSTRACT:

Background

Perception of upright is often assessed by aligning a luminous line to the subjective visual vertical (SVV).

Objective

Here we investigated the effects of visual line rotation and viewing eye on SVV responses and whether there was any change with head tilt.

Methods

SVV was measured using a forced-choice paradigm and by combining the following conditions in 22 healthy subjects: head position (20° left tilt, upright and 20° right tilt), viewing eye (left eye, both eyes and right eye) and direction of visual line rotation (clockwise [CW] and counter clockwise [CCW]).

Results

The accuracy and precision of SVV responses were not different between the viewing eye conditions in all head positions (P> 0.05, Kruskal-Wallis test). The accuracy of SVV responses

SUBMITTER: Kheradmand A 

PROVIDER: S-EPMC4890624 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature