The effect of optical devices and repeated trials on the velocity of saccadic eye movements.

Abstract:

OBJECTIVE:The purpose of this prospective study was to analyze the effect of glasses and contact lenses on the latency and velocity of visually evoked saccadic eye movements. MATERIAL AND METHODS:A saccadic test was performed 10 times on 20 emmetropic controls (Group A) and 20 ametropic test subjects with myopia (Group B) who were using glasses (Subgroup Bg) or contact lenses (Subgroup Bc). RESULTS:No training or fatigue effect on either latency or eye velocity was registered. Regardless of visual acuity (Group A or B) or of the optical device used (Subgroup Bg or Bc), no significant intergroup difference in latency could ultimately be established. Subgroup Bc showed a significantly slower eye velocity than Group A. Regardless of the optical device used, subjects with a higher degree of myopia (> 6 D) showed a lower eye velocity than the Group A controls. Additionally, saccadic velocity was lower in this subgroup ( > 6 D) in subjects using contact lenses than in those using glasses. CONCLUSION:These results demonstrate that optical devices have an influence on the electronystagmographical analyses of the vestibulo-ocular reflex that must be taken into consideration, particularly in scientific investigations.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Müller C,Stoll W,Schmäl F

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

471-6

issue

4

eissn

0001-6489

issn

1651-2251

journal_volume

123

pub_type

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