Effects of Visual Input Changes on Canal and Otolith- Dependent Vestibulo-Ocular Reflexes: A Review Study

Javad  Heravian Shandiz; Mahdi  Mazloom; Sadegh Jafarzadeh

doi:10.18502/avr.v32i2.12165

Javad Heravian Shandiz Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
Mahdi Mazloom Department of Optometry, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
Sadegh Jafarzadeh Department of Audiology, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran

DOI: https://doi.org/10.18502/avr.v32i2.12165

Abstract

Background and Aim: There is an integration between visual and vestibular systems. Changes in visual inputs can result in different changes in the Vestibulo-Ocular Reflex (VOR). This review study investigate the changes in VOR due to changes in visual inputs. In this regard, the effects of different conditions such as visual deprivation, changes in visual acuity, visual-vestibular conflict, and binocular vision dysfunction on VOR were assessed.

Recent Findings: Changes in visual inputs and visual-vestibular conflicts can lead to different changes in VOR.

Conclusion: The changes in VOR effects vary from slight to severe transformation dependent on the time course, severity and duration of changes in visual inputs.

Keywords: Vestibulo-ocular reflex; visual inputs; refractive errors; head impulse test