Gorgun Ebru, Kucumen Raciha Beril, Yenerel Nursal Melda, Ciftci Ferda
Department of Ophthalmology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey.
Ophthalmic Surg Lasers Imaging. 2012 May-Jun;43(3):214-21. doi: 10.3928/15428877-20120301-01. Epub 2012 Mar 8.
To examine the exact position of implanted Keraring (Mediphacos, Belo Horizonte, Brazil) segments by high-resolution anterior segment optical coherence tomography (AS-OCT).
This study included 17 eyes of 13 patients with keratoconus who underwent uneventful intracorneal ring segment implantation with the aid of femtosecond laser. Eyes were evaluated by AS-OCT at the third postoperative month. Distance from the apex of the triangular cross-section of the ring segment to the anterior corneal surface and distances from two basal corners to the posterior corneal surface were measured.
Distance from apex to anterior corneal surface (263.1 ± 42.9 μm) was significantly smaller than target depth calculated intraoperatively (356.9 ± 35.7 μm, P < .001). Distance between outer basal corner and posterior corneal surface was significantly greater than distance between inner basal corner and posterior corneal surface.
High-resolution AS-OCT is a rapid, convenient, and valuable technique in the follow-up of patients with implanted Keraring segments that may be helpful in predicting ring-related complications.
通过高分辨率眼前节光学相干断层扫描（AS-OCT）检查植入的Keraring（Mediphacos，巴西贝洛奥里藏特）角膜环片段的确切位置。
本研究纳入了13例圆锥角膜患者的17只眼，这些患者在飞秒激光辅助下顺利进行了角膜内环片段植入术。术后第三个月通过AS-OCT对眼睛进行评估。测量角膜环片段三角形横截面顶点到角膜前表面的距离以及两个底角到角膜后表面的距离。
顶点到角膜前表面的距离（263.1±42.9μm）显著小于术中计算的目标深度（356.9±35.7μm，P<.001）。外侧底角与角膜后表面之间的距离显著大于内侧底角与角膜后表面之间的距离。
高分辨率AS-OCT是随访植入Keraring角膜环片段患者的一种快速、便捷且有价值的技术，可能有助于预测与角膜环相关的并发症。
