Modified loop myopexy technique for severe high myopic strabismus fixus.

Area of Science:

• Ophthalmology
• Strabismus Surgery
• Myopia Management

Background:

• Severe high myopic strabismus fixus presents significant challenges in ocular alignment and movement.
• Existing surgical techniques may have limitations in fully addressing the complex nature of this condition.

Purpose of the Study:

• To introduce and evaluate a modified loop myopexy technique for treating severe high myopic strabismus fixus.
• To assess the efficacy of this modified technique, with or without medial rectus recession, in correcting ocular deviations and improving eye motility.

Main Methods:

• A retrospective study was conducted involving 25 patients (33 eyes) with severe high myopic strabismus fixus.
• The modified loop myopexy technique was performed, followed by medial rectus recession if residual esotropia persisted.
• Surgical outcomes were evaluated based on ocular deviations, eye movement limitations, and the angle of globe dislocation.

Main Results:

• Significant improvements were observed in mean esotropia (10 vs. 92 PD) and hypotropia (6 vs. 32 PD) deviations.
• Marked improvements in abduction (-2.7 vs. -5.0) and elevation (-3.2 vs. -5.0) limitations were noted.
• The angle of globe dislocation significantly decreased (103.0 vs. 235.3 D) post-surgery.

Conclusions:

• The modified Yokoyama's surgery is effective in correcting restrictive esotropia and hypotropia in severe myopic strabismus fixus.
• This technique successfully restores globe position within the muscle cone and enhances eye movement.
• The findings support the use of this modified loop myopexy for improved functional and anatomical outcomes.