Extraocular muscle imbalance after scleral buckling

Area of Science:

• Ophthalmology
• Surgical Outcomes
• Strabismus Research

Background:

• Scleral buckling is a common surgical procedure for retinal detachment.
• Postoperative muscle imbalance and strabismus are potential complications.
• Understanding risk factors and spontaneous resolution patterns is crucial for patient management.

Purpose of the Study:

• To prospectively evaluate the incidence and characteristics of postoperative muscle imbalance after conventional scleral buckling.
• To identify risk factors associated with the development of strabismus.
• To investigate the rate and potential causes of spontaneous resolution of heterotropia.

Main Methods:

• Prospective evaluation of 44 patients undergoing conventional scleral buckling.
• Assessment of strabismus, heterotropia, diplopia, and limitation of ductions postoperatively.
• Statistical analysis to correlate risk factors (implant placement, reoperation, macular status, implant size) with extraocular muscle imbalance.

Main Results:

• Strabismus was observed in 61% of patients (27/44).
• Spontaneous resolution of heterotropia occurred in 33% (9/27) within six months.
• Diplopia persisted in 13.6% and limited ductions in 50% of patients.
• Risk of strabismus was 2.5 times higher when implants were placed under rectus muscles.
• No significant correlation found between other evaluated factors and muscle imbalance.

Conclusions:

• Postoperative strabismus is a frequent complication of scleral buckling.
• Implant placement under rectus muscles is a significant risk factor.
• Spontaneous resolution is likely due to reduced swelling and improved visual acuity facilitating phoria adaptation.