Effect of horizontal rectus surgery for the correction of intermittent exotropia on sub-A or sub-V pattern

We evaluated effect of horizontal rectus surgery on sub-A or sub-V pattern intermittent exotropia. We enrolled patients with sub-A or sub-V pattern intermittent exotropia. The sub-A pattern was diagnosed when the eyes diverged less than 10 prism diopters (PD) from upgaze to downgaze, and sub-V patte...

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Bibliographic Details
Published in:PloS one 2017-06, Vol.12 (6), p.e0179626-e0179626
Main Authors: Lee, Young Bok, Rhiu, Soolienah, Lee, Joo Yeon, Choi, Mi Young, Paik, Hae Jung, Lim, Key Hwan, Choi, Dong Gyu
Format: Article
Language:English
Subjects:
Adolescent
Biology and Life Sciences
Care and treatment
Child
Collapse
Divergence
Engineering and Technology
Exotropia - pathology
Exotropia - surgery
Female
Genetic aspects
Health aspects
Hospitals
Humans
Male
Medicine
Medicine and Health Sciences
Muscle regeneration
Oculomotor Muscles - surgery
Ophthalmologic Surgical Procedures - standards
Patients
Physicians
Postoperative Period
Rectus muscle
Reduction
Retrospective Studies
Social Sciences
Strabismus
Surgery
Surgical outcomes
Transposition
Treatment Outcome
Visual Acuity
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Summary:We evaluated effect of horizontal rectus surgery on sub-A or sub-V pattern intermittent exotropia. We enrolled patients with sub-A or sub-V pattern intermittent exotropia. The sub-A pattern was diagnosed when the eyes diverged less than 10 prism diopters (PD) from upgaze to downgaze, and sub-V pattern when the divergence was 14 PD or less from downgaze to upgaze. Patients had undergone horizontal rectus surgery without vertical transposition of horizontal rectus muscle or oblique muscle weakening. The patients were divided into two groups: sub-A pattern (group A) and sub-V pattern (group V). The outcome measures were change of amount of pattern and rate of collapse of pattern postoperatively. The amount of pattern (vertical incomitance) was amount of difference in exodeviation between upgaze and downgaze. Collapse of pattern was defined as disappearance of difference in exodeviation between upgaze and downgaze. In groups A and V, preoperative amounts of pattern were 4.9 PD and 6.8 PD, respectively. A significant reduction in amount of pattern was observed in both groups throughout the follow-up period (p
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0179626