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Fixational Eye Movement Waveforms in Amblyopia: Characteristics of Fast and Slow Eye Movements
- Source :
- Journal of Eye Movement Research, Journal of Eye Movement Research, Vol 12, Iss 6 (2019), Journal of Eye Movement Research; Bd. 12 Nr. 6 (2019): Special Thematic Issue, part 1 "Microsaccades: Empirical Research and Methodological Advances“, Journal of Eye Movement Research; Vol. 12 No. 6 (2019): Special Thematic Issue, part 1 "Microsaccades: Empirical Research and Methodological Advances“
- Publication Year :
- 2019
- Publisher :
- Bern Open Publishing, 2019.
-
Abstract
- Fixational eye movements comprise of fast microsaccades alternating with slow inter-saccadic drifts. These physiologic eye movements play an important role in visual perception. Amblyopic patients are known to have fixation instability, particularly of the amblyopic eye. We examined eye movement abnormalities that contribute to this instability. We found that fixation stability is affected by the presence of fusion maldevelopment nystagmus (FMN). However, some amblyopes can have nystagmus without nasally directed slow phases and reversal in direction of the quick phase on ocular occlusion, features seen in FMN. In patients without nystagmus, we found increased amplitude of fixational saccades and inter-saccadic drifts. We categorized amblyopia patients by type (anisometropic, strabismic, or mixed) and eye movement waveform (no nystagmus, nystagmus without FMN, and FMN). We found specific fast and slow eye movement abnormalities of the fellow and amblyopic eye during fellow, amblyopic and both eyes viewing conditions across eye movement waveforms and types of amblyopia. These eye movement abnormalities can serve as biomarkers that can predict the impact of amblyopia as measured by visual acuity and stereopsis. Evaluation of fixational eye movements in amblyopia could be important to diagnose these common eye diseases and predict treatment effectiveness.
- Subjects :
- medicine.medical_specialty
Eye movement
Visual perception
Visual acuity
genetic structures
fixational stability
Nystagmus
children
Ophthalmology
0502 economics and business
medicine
050207 economics
Strabismus
amblyopia
050208 finance
business.industry
QM1-695
05 social sciences
saccades
strabismus
Sensory Systems
eye diseases
binocular viewing
microsaccades
Stereopsis
Human anatomy
Fixation (visual)
sense organs
medicine.symptom
Microsaccade
business
nystagmus
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 19958692
- Volume :
- 12
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Journal of Eye Movement Research
- Accession number :
- edsair.doi.dedup.....73bb5b6c200f287c712491da11e51e18