Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2018 Jan-Mar;8(1):24-30.
doi: 10.4103/tjo.tjo_44_17.

Factors affecting surgical outcome of intermittent exotropia

Chee-Ming Lee  1   2 , Ming-Hui Sun  1   2 , Ling-Yuh Kao  1   2 , Ken-Kuo Lin  1   2 , Meng-Ling Yang  1   2
Affiliations

Factors affecting surgical outcome of intermittent exotropia

Chee-Ming Lee et al. Taiwan J Ophthalmol. 2018 Jan-Mar.

Abstract

Purpose: The purpose of this study was to investigate the factors affecting surgical outcome in intermittent exotropia.

Designs: This was a retrospective interventional study.

Methods: Intermittent exotropic patients who had undergone surgical correction with a postoperative follow-up period of 1 month or more were included in the study. Surgical success was defined as an alignment between 10 prism diopters (PD) of exotropia or 5 PD of esotropia at 1 month. After data collection, data were analyzed in SPSS version 23 software. The main outcome measures were the factors affecting surgical outcome.

Results: We included 101 patients, including 52 (51.5%) male and 49 (48.5%) female. Among them, 62 (61.4%) patients achieved surgical success. Undercorrection was the primary reason of surgical failure. Multivariate regression analysis showed that a larger preoperative angle of deviation was associated with unfavorable surgical outcome (P = 0.053, odds ratio [OR] =0.97, 95% confidence interval [CI] = 0.94-1.00), and the presence of postoperative day 1 (POD 1) diplopia correlated significantly with higher surgical success (P = 0.001, OR = 4.54, 95% CI = 1.80-11.43). The presence of POD 1 diplopia was highly associated with POD 1 esotropia (P = 0.005, OR = 7.26, 95% CI = 1.84-28.58).

Conclusion: In intermittent exotropia, larger preoperative angle of deviation may predict a lower surgical success rate. Despite a worrisome issue, the presence of diplopia on first POD is associated with immediate postoperative alignment of esotropia and predicts a higher surgical success.

Keywords: Intermittent exotropia; postoperative diplopia; surgical outcome.

PubMed Disclaimer

Conflict of interest statement

The authors declare that there are no conflicts of interests of this paper.

References

    1. Kim MK, Kim US, Cho MJ, Baek SH. Hyperopic refractive errors as a prognostic factor in intermittent exotropia surgery. Eye (Lond) 2015;29:1555–60. - PMC - PubMed
    1. Jin KW, Choi DG. Outcome of two-muscle surgery for large-angle intermittent exotropia in children. Br J Ophthalmol. 2016:1–5. - PubMed
    1. Chen JH, Morrison DG, Donahue SP. Three and four horizontal muscle surgery for large angle exotropia. J Pediatr Ophthalmol Strabismus. 2015;52:305–10. - PubMed
    1. Yam JC, Chong GS, Wu PK, Wong US, Chan CW, Ko ST. Predictive factors affecting the short term and long term exodrift in patients with intermittent exotropia after bilateral rectus muscle recession and its effect on surgical outcome. Biomed Res Int. 2014;2014:482093. - PMC - PubMed
    1. Park JS, Jeon JB, Choi HY. Relationship between surgical result and alignment on the day of surgery in intermittent exotropia. J Korean Ophthalmol Soc. 2007;48:1106.