Venincasa Michael J, Osigian Carla J, Cavuoto Kara M, Rossetto Julia D, Capo Hilda
Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami Miller School of Medicine, Miami, Florida.
Department of Ophthalmology and Visual Sciences, Federal University of São Paulo, São Paulo, Brazil.
J AAPOS. 2017 Jun;21(3):243-246. doi: 10.1016/j.jaapos.2017.05.005. Epub 2017 May 17.
Anterior segment optical coherence tomography (AS-OCT) is useful for locating the extraocular muscle insertion prior to strabismus surgery; however, its accuracy decreases in reoperations. This masked retrospective study investigated whether a combination of AS-OCT modalities improves accuracy. The distance between the corneoscleral limbus and extraocular muscle insertion was measured with AS-OCT, first using the standard grayscale modality alone and then refined with the color modality. The AS-OCT measurement was considered accurate when within 1.00 mm of the intraoperative caliper measurement. A total of 139 AS-OCT images were analyzed from 74 patients (mean age, 52 years), including 60 medial rectus (19 reoperations), 61 lateral rectus (11 reoperations), 10 superior rectus, and 8 inferior rectus muscles. Compared to grayscale alone, the combination grayscale/color modalities improved AS-OCT accuracy from 77% to 87% (P = 0.03), reflecting an increase from 83% to 94% (P = 0.01) in primary surgeries and from 53% to 60% (P = 0.60) in reoperations.
眼前节光学相干断层扫描（AS-OCT）在斜视手术前定位眼外肌附着点方面很有用；然而，在再次手术中其准确性会降低。这项隐蔽性回顾性研究调查了AS-OCT不同模式的组合是否能提高准确性。使用AS-OCT测量角膜缘与眼外肌附着点之间的距离，首先单独使用标准灰度模式，然后用彩色模式进行优化。当AS-OCT测量值与术中卡尺测量值相差在1.00毫米以内时，该测量被认为是准确的。共分析了74例患者（平均年龄52岁）的139张AS-OCT图像，包括60条内直肌（19例再次手术）、61条外直肌（11例再次手术）、10条上直肌和8条下直肌。与单独使用灰度模式相比，灰度/彩色模式组合将AS-OCT的准确性从77%提高到了87%（P = 0.03），在初次手术中从83%提高到94%（P = 0.01），在再次手术中从53%提高到60%（P = 0.60）。
