Abstract
Purpose
To describe the evolution of a surgical technique for the correction of large-angle incomitant exodeviations.
Methods
Retrospective review of an interventional case series from 2005 to 2019 in a single centre, with analysis of surgical procedure, prism diopter (PD) deviations and complications.
Results
Thirty-one patients underwent surgery at an average age of 42 years (range 4–75 years) for minimal medial rectus function, mostly from oculomotor nerve palsy (23/31; 74%). The mean pre-operative exodeviation was 75 PD (range 30–200PD). Sixteen patients (52%) had undergone previous strabismus surgery. Thirty-eight operations were performed in which the medial rectus insertion was anchored to the periosteum of the posterior lacrimal crest via a retrocaruncular transconjunctival approach. The ipsilateral lateral rectus (LR) was disinserted and fixed to lateral orbital tissue in 29/38 (76%) operations, injected with botulinum toxin in 5, recessed in 2 and had already undergone maximal LR recession in 2. In all but the first 8 operations, temporary limbal sutures were passed through the eyelids to maximally adduct the globe post-operatively. At last follow-up (mean 24 months; range 2–130), the mean reduction in exodeviation was 49PD (range 10–80) and overall residual deviation was 26PD (range 80PD base-in to 14PD base-out). The 5 LR toxin procedures had a mean reduction of 22PD (range 10–40). Seven patients had persistent diplopia, one a transient corneal erosion and one caruncle suture exposure 4 years after surgery.
Conclusion
Large-angle exodeviations can be markedly improved by bi-rectus fixation. This approach is both safe and effective and can be performed in complex patients with multiple previous procedures.
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Professor Geoffrey Rose receives some funding from the National Institute of Health Research (NIHR) Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and the UCL Institute of Ophthalmology.
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Poster presentation AAPOS 2018, oral presentation BIPOSA 2018, poster presentation RANZCO 2019
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Hull, S., Al-Hayouti, H., Verity, D.H. et al. Periosteal fixation of the medial and lateral recti for large-angle incomitant exotropia. Graefes Arch Clin Exp Ophthalmol 260, 2347–2351 (2022). https://doi.org/10.1007/s00417-022-05567-z
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DOI: https://doi.org/10.1007/s00417-022-05567-z