Related Experiment Video
Updated: Jul 19, 2026
Surgical Correction for Pediatric Epiblepharon and Trichiasis
Published on: July 8, 2025
Long-term motor and sensory outcomes after early surgery for infantile esotropia
Eileen E Birch1, David R Stager
1Retina Foundation of the Southwest, Dallas, Texas 75231, USA. ebirch@retinafoundation.org
Insights
Early surgery for infantile esotropia by 6 months improves fusion and stereopsis. This approach shows better sensory outcomes without negatively impacting eye alignment compared to later surgery.
Area of Science:
- Ophthalmology
- Pediatric Surgery
- Strabismus Research
Background:
- The optimal timing for infantile esotropia surgery is debated, balancing sensory and motor outcomes.
- Recent studies suggest early intervention (by 6 months) may enhance sensory results.
Purpose of the Study:
- To evaluate motor and sensory outcomes in a prospective cohort of 50 children undergoing infantile esotropia surgery by 6 months of age.
- To compare these outcomes with a control group operated on between 7-12 months of age, with long-term follow-up (4-17 years).
Main Methods:
- Prospective study comparing two cohorts: early surgery (<=6 months) vs. later surgery (7-12 months).
- Evaluated parameters included angle of deviation, need for subsequent surgeries, spectacle use, amblyopia, fusion, and stereopsis.
- Statistical analysis compared outcomes between the early and later surgery groups.
Main Results:
- Both groups achieved similar postoperative alignment (within 6 prism diopters) and required comparable rates of additional surgery.
- The early surgery cohort demonstrated significantly higher rates of peripheral fusion (78% vs. 61%) and central fusion (15% vs. 2%).
- Superior stereopsis was observed in the early surgery group, with higher prevalence of Randot stereopsis (38% vs. 16%) and better stereoacuity (20% vs. 9%).
Conclusions:
- Infantile esotropia surgery before 6 months of age is associated with enhanced development of binocular vision, specifically fusion and stereopsis.
- Early surgical intervention does not compromise motor alignment outcomes.
- These findings support earlier surgical timing for improved long-term sensory benefits in infantile esotropia.
Purpose:
The proper timing of surgery for infantile esotropia remains controversial. Early surgery may yield better sensory outcomes whereas later surgery may result in better alignment. Several recent studies reported promising sensory outcomes in small groups of children that underwent surgery by 6 months of age. Here, we present motor and sensory outcomes of a cohort of 50 consecutive children enrolled in a prospective study who had surgery by 6 months of age and were followed for 4-17 years.
Methods:
Angle of deviation, subsequent surgeries, treatment with spectacles, amblyopia, fusion, and stereopsis were evaluated during follow-up. Outcomes from the early surgery group were compared with a concurrently recruited cohort who had surgery at 7-12 months (n=78).
Results:
On the initial visit, both cohorts had the same median angle of deviation (45(Delta)) and similar refractive error; the median angle of deviation increased by the final preop visit (55(Delta)). Postoperatively, both cohorts had alignment within 6(Delta) in 83-94% of cases on all visits. Both cohorts had similar rates of additional surgery, and 44-48% wore hyperopic correction postoperatively. Compared with the 7- to 12-month cohort, more children in the early-surgery cohort had peripheral fusion (78% vs 61%; p < 0.02), central fusion (15% vs 2%; p < 0.01), Randot stereopsis (38% vs 16%; p < 0.003), and Randot stereoacuity of 200 seconds or better (20% vs 9%; p < 0.05).
Conclusions:
Early surgery was associated with a higher prevalence of fusion and stereopsis, without adverse motor outcomes.
