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Ocular features and accommodative components in patients with spontaneous consecutive exotropia
Özlem Bursalı1, Burçin Çakır1, Kübra Özata Gündoğdu1
1Department of Ophthalmology, Sakarya University Education and Research Hospital, Sakarya, Turkey.
Taiwan Journal of Ophthalmology
|August 4, 2026
Summary
Spontaneous consecutive exotropia (SCXT) is linked to binocular vision deficiencies and lower accommodative convergence/accommodation (AC/A) ratios. Long-term monitoring is crucial following hyperopia correction.
Area of Science:
- Ophthalmology
- Strabismus Research
- Binocular Vision
Background:
- Spontaneous consecutive exotropia (SCXT) is a complex strabismus condition.
- Understanding its ophthalmological characteristics is essential for effective management.
Purpose of the Study:
- To investigate the ophthalmological features and accommodative aspects of SCXT.
- To compare these features with a control group without exotropia.
Main Methods:
- Retrospective analysis of medical records for 11 SCXT patients and 22 controls.
- Comparison of ophthalmic examination results, AC/A ratio, accommodation amplitude, fusional vergence, and near point of convergence (NPC).
Main Results:
- Remote NPC was more frequent in the SCXT group (27.2%) compared to controls.
- Stereopsis was reduced in SCXT patients.
- Significantly lower accommodative convergence/accommodation (AC/A) ratios were observed in the SCXT group.
Conclusions:
- SCXT is associated with binocular vision deficiencies.
- Lower AC/A ratios are characteristic of SCXT.
- The mean time to spontaneous exotropia development after hyperopia correction is approximately 6.4 years, necessitating long-term follow-up.
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