PURPOSE To investigate the effect of strabismus surgery on choroidal structure using the binarization method. METHODS Forty-two eyes of 27 patients who had surgery for horizontal strabismus were included in the study. Optical coherence tomography (OCT) images of the patients before the operation and at 1 day and 1 week after the operation were binarized. Total choroidal area (TCA), stromal area (SA), luminal area (LA), and choroidal vascularity index (CVI) were calculated and compared. RESULTS The mean age of the patients was 16.7 ± 13.5 years; 12 were female, and 15 were male. The mean spherical equivalent was 0.125 ± 0.50 diopters (D). The mean axial length value was 23.3 ± 1.3 mm. Preoperative TCA was 599686 ± 113451, LA was 394259 ± 67259, SA was 209180 ± 47723, and CVI was 0.66 ± 0.02. At 1 day postoperatively, TCA was 615575 ± 103686, LA was 395364 ± 60314, SA was 218418 ± 45620, and CVI was 0.65 ± 0.02. At 1 week postoperatively, TCA was 610997 ± 110578, LA was 394002 ± 65186, SA was 214995 ± 46481, and CVI was 0.66 ± 0.04. A statistically significant decrease in CVI and increase in TCA and SA were observed on the first postoperative day; these changes were observed as returning to preoperative values at 1 week postoperatively. CONCLUSIONS Strabismus surgery temporarily decreases the CVI by increasing the SA of the choroidal layer, possibly due to hemodynamic changes and/or inflammatory causes in the early period. [J Pediatr Ophthalmol Strabismus. 20XX;X(X):XX-XX.].

中文翻译：

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斜视手术对脉络膜血管的短期影响。

目的利用二值化方法研究斜视手术对脉络膜结构的影响。方法 本研究纳入了 27 名接受过水平斜视手术的患者的 42 只眼睛。对患者术前、术后1天和1周的光学相干断层扫描（OCT）图像进行二值化。计算并比较总脉络膜面积（TCA）、基质面积（SA）、管腔面积（LA）和脉络膜血管指数（CVI）。结果 患者的平均年龄为 16.7 ± 13.5 岁；其中女性 12 人，男性 15 人。平均球镜当量为 0.125 ± 0.50 屈光度 (D)。平均轴向长度值为 23.3 ± 1.3 mm。术前TCA为599686±113451，LA为394259±67259，SA为209180±47723，CVI为0.66±0.02。术后第1天，TCA为615575±103686，LA为395364±60314，SA为218418±45620，CVI为0.65±0.02。术后1周，TCA为610997±110578，LA为394002±65186，SA为214995±46481，CVI为0.66±0.04。术后第一天观察到 CVI 显着下降，TCA 和 SA 增加；术后 1 周观察到这些变化恢复到术前值。结论 斜视手术通过增加脉络膜层的 SA 暂时降低 CVI，这可能是由于早期血流动力学变化和/或炎症原因所致。[J 小儿眼科斜视。20XX;X(X):XX-XX.]。