Extraocular muscle fixation to the orbital wall

Area of Science:

• Ophthalmology
• Surgical Techniques
• Strabismus Treatment

Background:

• Severe or complex strabismus, including third nerve palsy, aberrant innervation of extraocular muscles (EOMs), and Duane syndrome, often yields suboptimal surgical outcomes.
• Existing surgical methods may not fully correct these challenging deviations.

Purpose of the Study:

• To describe a novel surgical technique for inactivating extraocular muscles (EOMs) by fixing them to the orbital wall.
• To present a potentially more effective approach for managing severe and complex strabismus.

Main Methods:

• A conjunctival incision is made, and the target EOM is dissected, sutured with non-absorbable material, and detached from the sclera.
• The sutured muscle is then secured to the orbital wall periosteum, posterior to the orbital rim.
• Intermuscular membrane closure and conjunctival reapproximation complete the procedure, aiming to eliminate globe-directed muscle forces.

Main Results:

• The described technique completely removes muscle forces from the globe.
• This EOM fixation method can potentially achieve better alignment in complex strabismus cases.
• The procedure is reversible and adaptable to other weakening surgeries if needed.

Conclusions:

• Fixation of extraocular muscles (EOMs) to the orbital wall offers a new approach for severe strabismus.
• This technique provides complete inactivation of muscle forces, potentially improving surgical success rates.
• The reversibility and adaptability of the procedure enhance its clinical utility.