Superior oblique tenotomy: indications and complications

Area of Science:

• Ophthalmology
• Strabismus Surgery
• Ocular Motility

Background:

• Superior oblique tenotomy is a surgical procedure used to treat certain types of strabismus.
• Previous studies have reported its effects primarily in downgaze.

Purpose of the Study:

• To evaluate the results and complications of superior oblique tenotomies, alone or with horizontal muscle surgery.
• To assess the effects of this surgery in primary and upgaze positions.

Main Methods:

• Analysis of two patient series undergoing superior oblique tenotomies.
• Evaluation of surgical outcomes, including gaze-dependent shifts and complications.

Main Results:

• An average 12 prism diopter eso-shift in primary gaze; no significant shift in upgaze.
• No worsening of hypertropia; transient Brown's syndrome reduced with steroids.
• V-pattern development decreased from 20% to 9% across series; inferior oblique overaction risk identified.

Conclusions:

• Superior oblique tenotomy is effective for A-pattern strabismus when indications are followed.
• Careful preoperative assessment, particularly of inferior oblique function, is crucial for minimizing complications.