Peer-reviewedCC BY-NC-NDTranslational vision science & technology1 Oct 2026

Impact of Strabismus Surgery on Anterior Segment Hemodynamics: An SS AS-OCTA-Based Study.

Longxiang Huang^1,2,3,4
Lanbing An^1,2,3,4
Weidong Zheng^1,2,3,4

4 affiliations

¹Department of Ophthalmology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China.
²Department of Ophthalmology, National Regional Medical Center, Binhai campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People's Republic of China.
³Fujian Institute of Ophthalmology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China.
⁴Fujian Provincial Clinical Medical Research Center of Eye Diseases and Optometry, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China.

Abstract

Purpose

The purpose of this study was to evaluate anterior segment (AS) hemodynamic changes after horizontal rectus muscle surgery using swept-source AS optical coherence tomography angiography (SS AS-OCTA).Methods

This prospective observational study included 99 patients undergoing unilateral horizontal rectus muscle surgery, classified into unilateral recession (UR) and recession-resection (RR) groups. Iris and conjunctival perfusion area (PA), microvascular density (MVD), and vascular density (VD) were measured preoperatively and at postoperative day 1, week 1, and month 1.Results

Iris changes were mild and localized after UR, whereas RR induced broader and transient increases in iris VD and other hemodynamic parameters, most evident at 1 day and 1 week and approaching baseline by 1 month. Conjunctival changes were more pronounced, particularly in operated quadrants, where PA and VD increased early after surgery. Non-operated quadrants also showed increased vascular parameters, suggesting possible redistribution of detectable vascular signals. Higher preoperative iris VD was associated with smaller postoperative changes. No clinically apparent anterior segment ischemia (ASI) was observed during follow-up.Conclusions

Horizontal rectus muscle surgery induces distinct but largely transient AS hemodynamic alterations, with greater changes after RR than UR. SS AS-OCTA enables noninvasive quantitative assessment of perioperative changes in AS vascular signals.Translational relevance

SS AS-OCTA may be most useful for studying reoperations, multiple-muscle or transposition procedures, and patients at increased risk of AS ischemia.

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Cite

BibTeX RIS

BibTeX

@article{huang2026impact,
  title = {{Impact of Strabismus Surgery on Anterior Segment Hemodynamics: An SS AS-OCTA-Based Study.}},
  author = {Longxiang Huang and Lanbing An and Weidong Zheng},
  journal = {Translational vision science \& technology},
  year = {2026},
  month = oct,
  doi = {10.1167/tvst.15.10.7},
  url = {https://europepmc.org/article/MED/42841581},
  note = {CC BY-NC-ND},
}

RIS

TY  - JOUR
TI  - Impact of Strabismus Surgery on Anterior Segment Hemodynamics: An SS AS-OCTA-Based Study.
AU  - Longxiang Huang
AU  - Lanbing An
AU  - Weidong Zheng
PY  - 2026
DA  - 2026/10/01
JO  - Translational vision science & technology
DO  - 10.1167/tvst.15.10.7
UR  - https://europepmc.org/article/MED/42841581
AB  - Purpose  The purpose of this study was to evaluate anterior segment (AS) hemodynamic changes after horizontal rectus muscle surgery using swept-source AS optical coherence tomography angiography (SS AS-OCTA).Methods  This prospective observational study included 99 patients undergoing unilateral horizontal rectus muscle surgery, classified into unilateral recession (UR) and recession-resection (RR) groups. Iris and conjunctival perfusion area (PA), microvascular density (MVD), and vascular density (VD) were measured preoperatively and at postoperative day 1, week 1, and month 1.Results  Iris changes were mild and localized after UR, whereas RR induced broader and transient increases in iris VD and other hemodynamic parameters, most evident at 1 day and 1 week and approaching baseline by 1 month. Conjunctival changes were more pronounced, particularly in operated quadrants, where PA and VD increased early after surgery. Non-operated quadrants also showed increased vascular parameters, suggesting possible redistribution of detectable vascular signals. Higher preoperative iris VD was associated with smaller postoperative changes. No clinically apparent anterior segment ischemia (ASI) was observed during follow-up.Conclusions  Horizontal rectus muscle surgery induces distinct but largely transient AS hemodynamic alterations, with greater changes after RR than UR. SS AS-OCTA enables noninvasive quantitative assessment of perioperative changes in AS vascular signals.Translational relevance  SS AS-OCTA may be most useful for studying reoperations, multiple-muscle or transposition procedures, and patients at increased risk of AS ischemia.
SN  - 2164-2591
ER  -

Abstract

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