Surgical Techniques for Superior Oblique Muscle Disorders
Summary
Disorders of the superior oblique muscle encompass overaction, palsy and restrictive syndromes such as Brown’s syndrome. Surgical intervention aims to restore ocular alignment, reduce abnormal head posture and improve binocular function. Techniques broadly fall into two categories: weakening procedures and lengthening procedures. Weakening may be achieved through tenectomy, hang-back recession or posterior tenectomy, each altering the tension or insertion of the tendon. Lengthening approaches include use of silicone or autogenous spacers to extend the tendon and modulate its pull. Surgical planning must consider patterns of strabismus (A-pattern, V-pattern), presence of dissociated vertical deviation, associated rectus muscle dysfunction and torsional misalignment. A staged approach is often required in complex cases, addressing primary oblique imbalance before secondary inferior oblique overaction. Recent advances have refined adjustable techniques, minimised scarring and tailored interventions to individual ocular motility profiles, leading to higher success rates and reduced reoperation.
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Surgical Techniques for Superior Oblique Muscle Disorders publication trend
The graph below shows the total number of articles in surgical techniques for superior oblique muscle disorders across all publications each year (not limited to Nature Index journals).
Technical terms
Superior oblique muscle: An extraocular muscle responsible for intorsion, depression and abduction of the eye.
Tenectomy: Surgical excision of a segment of tendon to weaken muscle action.
Recession: Detachment and posterior reattachment of a muscle insertion to reduce its effective tension.
Suture spacer: Insertion of a segment of material between tendon ends to lengthen and weaken the muscle.
Dissociated vertical deviation: A latent upward drifting of one eye that occurs independently of the fellow eye.
References
- Factors influencing the result of superior oblique weakening procedures in patients with superior oblique overaction in horizontal strabismus. BMC Ophthalmology (2020).
- Surgical management of Helveston syndrome (Triad exotropia). International Ophthalmology (2021).
- Natural History and Treatment of Brown’s Syndrome: Long-Term Experience. Open Journal of Ophthalmology (2018).
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