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已发表论文
基于近距离偏斜程度的集合不足型外斜视分层手术方法：一项关于运动和感觉结局的回顾性队列研究
Received 21 July 2025
Accepted for publication 27 October 2025
Published 7 November 2025 Volume 2025:21 Pages 1559—1567
DOI https://doi.org/10.2147/TCRM.S550542
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 2
Editor who approved publication: Professor Garry Walsh
Feng Dong, Ping Liu, Yanyan Wang
Department of Strabismus and Pediatric Ophthalmology, Eye Good Hospital, Wuhan, People’s Republic of China
Correspondence: Feng Dong, Department of Strabismus and Pediatric Ophthalmology, Eye Good Hospital, No. 8 Longyang Avenue, Longyang Street, Hanyang District, Wuhan, Hubei, 430051, People’s Republic of China, Tel +86-027-85551616, Email 59668898@qq.com
Objective: To evaluate the efficacy and safety of a stratified surgical strategy for convergence insufficiency-type exotropia (CIX(T)) tailored to the magnitude of near deviation, with a primary outcome of postoperative motor success (orthophoria) and a secondary outcome of stereopsis improvement.
Methods: This retrospective cohort study included 85 CIX(T) patients (near deviation ≥ distance deviation by 15Δ) treated between July 2015 and June 2022. Patients were stratified into three groups based on near deviation magnitude. Group 1 (n=15, < 30Δ) underwent unilateral medial rectus resection; Group 2 (n=38, 30– 80Δ) received unilateral lateral rectus recession combined with medial rectus resection; Group 3 (n=32, 85– 130Δ) underwent bilateral lateral rectus recession plus unilateral medial rectus resection. Ocular alignment (prism cover test) and stereopsis (Titmus test) were assessed preoperatively, at 1 week (short-term), and 3 months (intermediate-term) postoperatively.
Results: Baseline characteristics were comparable across groups, except for the stratification variable of near deviation. At the 3-month follow-up, motor success was achieved in 20.0% of Group 1, 89.5% of Group 2, and 87.5% of Group 3. Group 1 showed a high rate of undercorrection (80.0%), whereas Groups 2 and 3 demonstrated stable alignment with minimal undercorrection (10.5% and 9.4%, respectively). Stereopsis scores significantly improved from preoperative levels in Group 2 (P< 0.001) and Group 3 (P< 0.001), but regressed in Group 1 (P> 0.05). A planned slight initial overcorrection (10– 15Δ) at distance was significantly correlated with better intermediate-term alignment (r = 0.68, 95% CI: 0.51 to 0.80, P< 0.001).
Conclusion: These findings support a stratified surgical approach for CIX(T) based on near deviation magnitude. While combined recession-resection procedures are effective for moderate-to-large angle deviations, unilateral medial rectus resection for small-angle CIX(T) resulted in high rates of undercorrection. This suggests that the surgical plan for small-angle CIX(T) may require more aggressive dosages or alternative strategies.
Keywords: convergence insufficiency-type exotropia, surgical treatment, retrospective study, near deviation, binocular vision, stratified medicine
Department of Strabismus and Pediatric Ophthalmology, Eye Good Hospital, Wuhan, People’s Republic of China
Correspondence: Feng Dong, Department of Strabismus and Pediatric Ophthalmology, Eye Good Hospital, No. 8 Longyang Avenue, Longyang Street, Hanyang District, Wuhan, Hubei, 430051, People’s Republic of China, Tel +86-027-85551616, Email 59668898@qq.com
Objective: To evaluate the efficacy and safety of a stratified surgical strategy for convergence insufficiency-type exotropia (CIX(T)) tailored to the magnitude of near deviation, with a primary outcome of postoperative motor success (orthophoria) and a secondary outcome of stereopsis improvement.
Methods: This retrospective cohort study included 85 CIX(T) patients (near deviation ≥ distance deviation by 15Δ) treated between July 2015 and June 2022. Patients were stratified into three groups based on near deviation magnitude. Group 1 (n=15, < 30Δ) underwent unilateral medial rectus resection; Group 2 (n=38, 30– 80Δ) received unilateral lateral rectus recession combined with medial rectus resection; Group 3 (n=32, 85– 130Δ) underwent bilateral lateral rectus recession plus unilateral medial rectus resection. Ocular alignment (prism cover test) and stereopsis (Titmus test) were assessed preoperatively, at 1 week (short-term), and 3 months (intermediate-term) postoperatively.
Results: Baseline characteristics were comparable across groups, except for the stratification variable of near deviation. At the 3-month follow-up, motor success was achieved in 20.0% of Group 1, 89.5% of Group 2, and 87.5% of Group 3. Group 1 showed a high rate of undercorrection (80.0%), whereas Groups 2 and 3 demonstrated stable alignment with minimal undercorrection (10.5% and 9.4%, respectively). Stereopsis scores significantly improved from preoperative levels in Group 2 (P< 0.001) and Group 3 (P< 0.001), but regressed in Group 1 (P> 0.05). A planned slight initial overcorrection (10– 15Δ) at distance was significantly correlated with better intermediate-term alignment (r = 0.68, 95% CI: 0.51 to 0.80, P< 0.001).
Conclusion: These findings support a stratified surgical approach for CIX(T) based on near deviation magnitude. While combined recession-resection procedures are effective for moderate-to-large angle deviations, unilateral medial rectus resection for small-angle CIX(T) resulted in high rates of undercorrection. This suggests that the surgical plan for small-angle CIX(T) may require more aggressive dosages or alternative strategies.
Keywords: convergence insufficiency-type exotropia, surgical treatment, retrospective study, near deviation, binocular vision, stratified medicine