Extraocular Rectus Muscle Stretching as a Weakening Procedure.

Area of Science:

• Ophthalmology
• Surgical Techniques
• Strabismus Management

Background:

• Anterior segment ischemia is a risk following surgery on three or more rectus muscles.
• Investigating alternative weakening techniques is crucial for patient safety.

Purpose of the Study:

• To evaluate rectus muscle stretching as a vessel-sparing weakening method.
• To compare its efficacy against standard rectus muscle recession.

Main Methods:

• A prospective study involving patients with medial rectus muscle weakening needs (up to 20 prism diopters).
• A double-needle suture was used to stretch the muscle 4 mm from insertion, securing it 3-5 mm posterior.
• The primary outcome was the change in deviation measured by the alternate prism and cover test at 2 months.

Main Results:

• Seven patients with esotropia (12-20 PD) were included.
• Preoperative median deviation of 20 PD decreased to a postoperative median of 4 PD.
• No significant complications occurred, and outcomes were comparable to standard recession.

Conclusions:

• Rectus muscle stretching demonstrates a weakening effect suitable for correcting small-angle strabismus.
• This technique may be a valuable vessel-sparing option when two rectus muscles have already been operated on.