Strabismus developing after unilateral and bilateral cataract surgery in children

Area of Science:

• Ophthalmology
• Pediatric Surgery
• Strabismus Research

Background:

• Strabismus is a common condition affecting binocular vision.
• Pediatric cataract surgery presents unique challenges regarding visual development and alignment.
• Understanding strabismus prevalence and risk factors post-surgery is crucial for optimal outcomes.

Purpose of the Study:

• To determine the incidence and risk factors of strabismus in children following cataract surgery.
• To analyze the impact of surgical factors, such as unilateral vs. bilateral cataract and intraocular lens (IOL) implantation, on strabismus development.
• To investigate the relationship between age at surgery, visual acuity, and post-operative strabismus.

Main Methods:

• Retrospective review of pediatric cataract surgery cases from 2000-2011.
• Inclusion criteria: minimum 1-year follow-up; exclusion of trauma, prematurity, or systemic disorders.
• Data collected: pre- and post-operative strabismus, age at surgery, aphakia/pseudophakia status, and visual acuity.

Main Results:

• Strabismus was present preoperatively in 34.4% and at follow-up in 43.3% of 90 pediatric patients.
• New-onset strabismus occurred in 46.2% of initially orthotropic patients; 32.3% of pre-existing strabismus resolved.
• Strabismus was more frequent after unilateral (63.9%) than bilateral (29.6%) surgery, and in younger operated children (25.9 vs. 52.7 months).
• No significant difference in strabismus prevalence between aphakic (46.7%) and pseudophakic (58.7%) children.
• Poor final visual acuity correlated with higher strabismus prevalence.

Conclusions:

• Strabismus is a frequent complication following pediatric cataract surgery.
• Unilateral cataract surgery and younger age at operation are significant risk factors for developing strabismus.
• Intraocular lens implantation did not correlate with strabismus prevalence; visual acuity is an important factor.