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Clinical assessment of visual function in the young child: a prospective study of binocular vision
Insights
Early corrective surgery for infantile esotropia in children can restore binocular vision and stereopsis. Post-surgery assessments show significant improvements in visual function for young patients.
Area of Science:
- Ophthalmology
- Pediatric Vision
- Neuroscience
Background:
- Infantile esotropia is a common childhood eye misalignment.
- Assessing binocular vision in preverbal children presents challenges.
- Early intervention is crucial for visual development.
Purpose of the Study:
- To evaluate the impact of corrective surgery on binocular vision in children with infantile esotropia.
- To assess the development of stereopsis and binocular summation post-surgery.
- To highlight the utility of objective tests for preverbal children.
Main Methods:
- Binocular vision assessment in 12 children with infantile esotropia before and after surgery.
- Stereopsis measurement using the eye movement/global stereopsis method.
- Binocular and monocular pattern Visual Evoked Responses (VERs) recorded in a subgroup of four infants.
Main Results:
- 50% of children undergoing surgery before age one developed gross stereopsis within two weeks.
- 50% of infants initially lacking stereopsis showed binocular summation post-surgery.
- Objective VER testing demonstrated improvements in binocularity.
Conclusions:
- Surgical correction for infantile esotropia can effectively restore stereopsis and binocular summation.
- Objective tests like VERs are valuable for assessing preverbal infants.
- Prospective studies are essential to understand long-term visual outcomes.
Abstract:
Binocular vision was evaluated in 12 children with infantile esotropia before and after corrective surgery. Stereopsis was measured by the eye movement/global stereopsis method. Also in a subgroup of four infants, binocular and monocular pattern VERs were recorded to evaluate binocular summation. Results revealed 50% of the infantile esotropia children who had corrective surgery before one year of life developed gross stereopsis two weeks following surgery. In addition, of four infants who showed no evidence of stereopsis, 50% showed some degree of binocular summation following surgery. The importance of prospective studies of binocular vision in infantile esotropia is discussed within the context of new tests that can be used to objectively assess binocularity in the preverbal child.