Brown's syndrome: diagnosis and management

Area of Science:

• Ophthalmology
• Strabismus Research
• Pediatric Ophthalmology

Background:

• Brown's syndrome is a condition affecting eye movement, characterized by restricted elevation in adduction.
• Understanding its diverse etiologies and clinical presentations is crucial for effective management.

Purpose of the Study:

• To elucidate the etiologies and clinical characteristics of Brown's syndrome.
• To describe the natural history and evaluate the outcomes of the silicone tendon expander procedure.
• To simulate Brown's syndrome using a computer model to predict surgical results.

Main Methods:

• Retrospective chart review of 96 patients diagnosed with Brown's syndrome.
• Objective fundus torsion assessment in various gaze positions.
• Fax survey of ophthalmologists regarding the silicone tendon expander.
• Computer modeling of the superior oblique muscle-tendon complex.

Main Results:

• Identified limitations in elevation and associated strabismus patterns.
• Congenital and acquired Brown's syndrome showed distinct hypotropia characteristics.
• The silicone tendon expander demonstrated high success rates (87% with one surgery, 93% with two).
• Computer model accurately simulated Brown's syndrome motility patterns.

Conclusions:

• Brown's syndrome is typically associated with an inelastic superior oblique muscle-tendon complex.
• Diagnosis can be made by observing strabismus patterns, including torsion.
• Conservative management is advised for acquired cases; the silicone tendon expander is a viable surgical option.