Adaptation of the Vestibulo-Ocular Reflex to Concave Spectacle Lens.
- Author:
Hyun Min PARK
1
;
Han Gyun KIM
;
Chung Ku RHEE
;
Phil Sang CHUNG
Author Information
1. Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Dankook University, Cheonan, Korea. parkhm@anseo.dankook.ac.kr
- Publication Type:Original Article
- Keywords:
Adaptation;
Vestibulo-ocular reflex;
Gain;
Myopic lens
- MeSH:
Acceleration;
Calibration;
Eye Movements;
Eyeglasses;
Glass;
Head Movements;
Humans;
Photic Stimulation;
Plastics;
Reflex, Vestibulo-Ocular*;
Volunteers
- From:Korean Journal of Otolaryngology - Head and Neck Surgery
1999;42(10):1230-1233
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND AND OBJECTIVES: Vestibulo-ocular reflex (VOR) is the mechanism for the production of rapid compensatory eye movement during head movements. VOR gain can adapt to a change in visual stimulation, which is called adaptive plasticity. To investigate the adaptation of VOR to concave spectacle lens, the authors compared the diopters with VOR gain changes. MATERIALS AND METHODS: Calibration and sinusoidal harmonic acceleration (SHA) rotation tests at 0.01, 0.04 and 0.16 Hz were performed on 24 volunteer subjects wearing myopic lenses, with glasses on and off. RESULTS: VOR gains of patients with glasses-on were significantly greater, compared with those without glasses. Correlation between diopters and gain change ratio was significant, especially at low frequencies. CONCLUSION: Long-term wearing of myopic lenses induced VOR gain reduction, which is proportioned to the diopter of the lenses.
