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Dissociative phenomena in congenital monocular elevation deficiency
Summary
Dissociated vertical deviation can occur in children with congenital monocular elevation deficiency, particularly after strabismus surgery. This finding highlights a potential complication to monitor in pediatric ophthalmology patients.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Strabismus
Background:
- Monocular elevation deficiency (MED) presents as a congenital, unilateral limitation of eye elevation.
- Dissociated vertical deviation (DVD) is less commonly associated with MED compared to other strabismus conditions.
Purpose of the Study:
- To investigate the occurrence of dissociated vertical deviation (DVD) in patients with congenital monocular elevation deficiency (MED).
Main Methods:
- Retrospective review of 31 patients diagnosed with congenital MED between 1971 and 1995.
- Exclusion of patients with acquired causes of MED or other specific conditions.
- Analysis of DVD development in relation to age, follow-up duration, and prior strabismus surgery.
Main Results:
- 29% (9 of 31) of patients with congenital MED developed DVD.
- DVD onset occurred after strabismus surgery in all affected patients (mean 3.5 years post-surgery).
- Patients who developed DVD were younger and had longer follow-up periods.
Conclusions:
- Congenital monocular elevation deficiency is associated with the development of dissociated vertical deviation.
- Strabismus surgery may be a factor in the development of DVD in these patients.