Why should surgery for early-onset strabismus be postponed?

Area of Science:

• Ophthalmology
• Pediatric Ophthalmology
• Strabismology

Background:

• Early-onset convergent strabismus can lead to pseudoparalysis of bilateral rectus muscles.
• Timely surgical intervention is crucial for optimal outcomes in strabismus patients.

Purpose of the Study:

• To evaluate long-term motor and sensorial outcomes of early surgery for pseudoparalysis in early-onset convergent strabismus.
• To analyze the impact of surgical timing on achieving binocular association.

Main Methods:

• A continued study of 82 cases with early-onset convergent strabismus.
• Surgical procedures included bimedial rectus recession with retroequatorial myopexy.
• Long-term follow-up (up to 10 years) assessing motor alignment and sensorial status.

Main Results:

• 72% of cases achieved motor alignment within +/- 10 prism diopters after one surgery.
• Binocular association was primarily achieved in patients operated on before one year of age.
• The study also discussed the development of alphabetical syndromes, dissociated vertical divergence, and refractive evolution.

Conclusions:

• Early surgical intervention for pseudoparalysis in early-onset convergent strabismus yields favorable long-term motor results.
• Optimal visual development, including binocular association, is strongly associated with very early surgical correction (before age 1).
• Surgical techniques and potential complications like alphabetical syndromes and dissociated vertical divergence require careful consideration.