Convergence, Accommodation, Fusion, and Stereopsis: What Keeps the Eyes Aligned in Intermittent Exotropia?
Joint Authors
Schiavi, Costantino
Tassi, Filippo
Di Croce, Valentina
Primavera, Laura
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-07-26
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Purpose.
To investigate the relationships between angle of deviation, fusional convergence and divergence amplitude, AC/A ratio, near point of convergence (NPC), and myopia-phoria in intermittent exotropia (IXT).
Methods.
93 patients with IXT, divided into two groups, were recruited in the study.
In Group A (73 patients), fusional convergence and divergence amplitudes, NPC, and AC/A ratio were studied and compared with a control group.
In Group B (in 20 patients), myopia-phoria while switching from monocular to binocular view was studied with an infrared video retinoscopy and compared with a control group.
Results.
In Group A, positive fusional amplitudes, NPC, and AC/A ratio of IXT patients did not differ from those of normals.
Negative fusional amplitudes were significantly higher in the patient group than in the control group.
In Group B, myopic shift was statistically significantly higher in the patient group and there was a statistically significant positive correlation between myopic shift and angle of strabismus.
Conclusions.
Apart from the role of fusional convergence which accounts for myopia-phoria, that of the other binocular functions in the control at near of IXT and conversely their specific role in the pathogenesis of IXT remain unclear and the cause of divergent infantile strabismus is still unknown.
American Psychological Association (APA)
Schiavi, Costantino& Di Croce, Valentina& Primavera, Laura& Tassi, Filippo. 2018. Convergence, Accommodation, Fusion, and Stereopsis: What Keeps the Eyes Aligned in Intermittent Exotropia?. Scientifica،Vol. 2018, no. 2018, pp.1-6.
https://search.emarefa.net/detail/BIM-1213798
Modern Language Association (MLA)
Schiavi, Costantino…[et al.]. Convergence, Accommodation, Fusion, and Stereopsis: What Keeps the Eyes Aligned in Intermittent Exotropia?. Scientifica No. 2018 (2018), pp.1-6.
https://search.emarefa.net/detail/BIM-1213798
American Medical Association (AMA)
Schiavi, Costantino& Di Croce, Valentina& Primavera, Laura& Tassi, Filippo. Convergence, Accommodation, Fusion, and Stereopsis: What Keeps the Eyes Aligned in Intermittent Exotropia?. Scientifica. 2018. Vol. 2018, no. 2018, pp.1-6.
https://search.emarefa.net/detail/BIM-1213798
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1213798