Department of Ophthalmology, Shanghai Aier Eye Hospital, Shanghai, China.
Department of Auxiliary Examination, Shanghai Aier Eye Hospital, Shanghai, China.
BMC Ophthalmol. 2023 Jun 16;23(1):281. doi: 10.1186/s12886-023-03014-z.
To investigate the changes of anterior eye segment with implantable collamer lens (ICL) under mesopic and photopic conditions.
Forty-seven eyes of myopic patients who underwent ICL V4c implantation were included. Three months after surgery, the pupil diameter (PD), dynamic vault, ACD (distance from the posterior corneal surface to the anterior lens surface), ACD-ICL (distance from the posterior corneal surface to the anterior ICL surface), and anterior chamber angle parameters were measured using the anterior segment optical coherence tomography (AS-OCT, Carl Zeiss AG, Germany) under completely mesopic (0 lx) and photopic (5290 lx) lighting conditions.
Compared with mesopic conditions, a significant decreased vault was detected in photopic conditions (486.7 ± 186.1 μm versus 643.5 ± 191.2 μm, p < 0.001), while the ACD-ICL increased significantly (2.54 ± 0.24 mm versus 2.37 ± 0.23 mm, p < 0.001). The pupil was smaller in photopic condition (2.66 ± 0.23 mm versus 5.62 ± 0.55 mm, p < 0.001). ACD didn't change(3.32 ± 0.24 mm versus 3.31 ± 0.22 mm, p = 0.079). The change of the vault was positively related to the changes of the PD (r = 0.301, p = 0.04). There were no statistical difference between the change of vault and the change of ACD-ICL (158.0 ± 58.1 μm versus 165.9 ± 65.3 μm, p = 0.320).
When exposed to high intensity light after ICL surgery, the pupil constricted, vault decreased, ACA widened and ACD-ICL increased. All these changes were caused by the change of iris not the crystalline lens.
研究植入性可折叠 Collamer 透镜（ICL）在中光和高光条件下眼前节的变化。
纳入 47 例接受 ICL V4c 植入的近视患者。术后 3 个月，使用前节光学相干断层扫描（AS-OCT，德国卡尔蔡司公司）分别在完全中光（0 lx）和高光（5290 lx）照明条件下测量瞳孔直径（PD）、动态拱高、ACD（后角膜表面至前晶状体表面的距离）、ACD-ICL（后角膜表面至前 ICL 表面的距离）和前房角参数。
与中光条件相比，在高光条件下拱高明显降低（486.7 ± 186.1 μm 比 643.5 ± 191.2 μm，p < 0.001），而 ACD-ICL 明显增加（2.54 ± 0.24 mm 比 2.37 ± 0.23 mm，p < 0.001）。在高光条件下瞳孔更小（2.66 ± 0.23 mm 比 5.62 ± 0.55 mm，p < 0.001）。ACD 无变化（3.32 ± 0.24 mm 比 3.31 ± 0.22 mm，p = 0.079）。拱高的变化与 PD 的变化呈正相关（r = 0.301，p = 0.04）。拱高的变化与 ACD-ICL 的变化无统计学差异（158.0 ± 58.1 μm 比 165.9 ± 65.3 μm，p = 0.320）。
ICL 手术后暴露于高强度光线下时，瞳孔缩小，拱高降低，ACA 变宽，ACD-ICL 增加。所有这些变化都是由虹膜的变化引起的，而不是晶状体的变化。
