Department of Ophthalmology, Dankook University Hospital, Cheonan, Republic of Korea.
Department of Ophthalmology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
Sci Rep. 2021 Dec 14;11(1):23934. doi: 10.1038/s41598-021-03351-3.
Extraocular muscle movement during strabismus surgery causes changes in eyeball shape. Because extraocular muscle insertion is in front of the equator, it is thought that changes due to strabismus surgery mainly occur in the anterior segment. However, changes in the posterior segment of eye may also occur, which may also result in changes in refractive error after strabismus surgery. Using a 3-dimensional reconstruction technique (en face imaging) of the swept source optical coherence tomography, we determined and quantitatively measured the posterior polar change. The deepest interface between Bruch's membrane and the choroid could be identified as the deepest point of the eyeball (DPE), and the location of the DPE relative to the optic disc and the fovea was measured. After lateral rectus muscle recession, the DPE moved away from the fovea, but after medial rectus muscle recession, the DPE moved toward the fovea. The amount of DPE movement differed by age and preoperative refractive error. Our findings suggest that the positional shift of the rectus muscle in horizontal strabismus surgery causes a structural change in the posterior segment of the eye, and the postoperative refractive changes may be related to this shift.
斜视手术中外直肌的运动导致眼球形状发生变化。由于眼外肌的附着点位于赤道前面，因此人们认为斜视手术引起的变化主要发生在前节。然而，后节眼也可能发生变化，这也可能导致斜视手术后屈光不正的变化。我们使用扫频源光学相干断层扫描的三维重建技术（断层成像）来确定和定量测量后极的变化。可以将最接近脉络膜的布鲁赫膜最深界面识别为眼球最深处（DPE），并测量 DPE 相对于视盘和黄斑的位置。在外侧直肌后退术后，DPE 从黄斑移开，但在内侧直肌后退术后，DPE 向黄斑移动。DPE 的移动量与年龄和术前屈光不正有关。我们的研究结果表明，水平斜视手术中外直肌的位置移动导致眼后节的结构发生变化，术后屈光变化可能与此移位有关。
