Three-Dimensional Quantitative Description Of The Implantable Collamer Lens In The Ocular Anterior Segment Of Myopic Patients
Published 2023 - 41st Congress of the ESCRS
Reference: PO0992 | DOI: 10.82333/j5cr-c768
Authors: Wenjuan Wan* 1 , Tong Zhang 1 , Ke Hu 1
1The First Affiliated Hospital of Chongqing Medical University,Chongqing,China
To describe the three-dimensional location of the Implantable Collamer Lens (ICL) quantitatively in the posterior ocular chamber of myopic patients.
a cross-sectional study
An automatic three-dimensional (3D) imaging technique based on swept-source Optical Coherence Tomography was built to obtain visualization models before and after mydriasis. The parameters like the ICL-Lens Volume (ILV), the tilt of ICL and crystalline lens, the vault distribution index and topographic maps were evaluated to describe the ICL location. The difference between the non-mydriasis and post-mydriasis were compared using paired-sample t-test and Wilcoxon signed-rank test.
The study involved 32 eyes of 20 patients. There was no significant difference in 3D central vault before and after mydriasis (P=0.626>0.05). After mydriasis, the 5-mm ILV decreased by 0.85 mm2 (P=0.016<0.05) and the vault distribution index increased significantly(P=0.001). The tilt of the ICL and crystalline lens were observed (non-mydriasis: ICL total tilt: 3.78 ±1.85°, lens total tilt: 4.03 ±1.53°; post-mydriasis: ICL total tilt: 3.84 ±1.56°, lens total tilt: 4.09 ±1.64°). The phenomenon of asynchronous tilt of ICL and lens was found in five eyes, which led to the spatially asymmetric distribution of the ICL-lens distance.
The 3D imaging offered comprehensive and trustworthy data in anterior segment. The visualization models provided a multi-view of the ICL in the posterior chamber. The 3D parameters could describe the intraocular ICL position before and after mydriasis.