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Improvement in binocular summation after strabismus surgery
Stacy L Pineles1, Joseph L Demer1, Sherwin J Isenberg1
1Jules Stein Eye Institute, University of California, Los Angeles.
JAMA Ophthalmology
|January 3, 2015
Summary
Strabismus surgery improves binocular summation (BiS), enhancing vision with both eyes. Postoperative BiS scores increased, particularly at low contrast, suggesting a new functional benefit of surgical strabismus correction.
Area of Science:
- Ophthalmology
- Vision Science
- Surgical Outcomes
Background:
- Binocular summation (BiS) is reduced in patients with strabismus.
- The effect of strabismus surgery on BiS is not well understood.
Purpose of the Study:
- To investigate whether strabismus surgery leads to improvements in binocular summation.
Main Methods:
- Prospective study of 97 patients undergoing strabismus surgery.
- Visual acuity was measured binocularly and monocularly before and 2 months after surgery.
- Binocular summation was calculated using high- and low-contrast charts.
Main Results:
- Binocular summation scores improved postoperatively, especially at low contrast levels.
- The proportion of patients with improved BiS increased significantly after surgery.
- Postoperative binocular inhibition decreased across all contrast levels.
Conclusions:
- Strabismus surgery generally improves binocular summation.
- Enhanced BiS may be a functional benefit of surgical strabismus correction.
- Further research is needed to correlate BiS with stereopsis and quality of life.
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