Analysis of intraocular positions of posterior implantable collamer lens by full-scale ultrasound biomicroscopy

Abstract

BackgroundTo analyze the positions of intraocular posterior Implantable Collamer Lens (ICL) and its possible relationship with vault.MethodsThis cross-sectional study included 72 patients with high myopia (134 eyes) who were followed up after phakic intraocular lens implantation. The postoperative time ranged from 1 week to 7 years. We obtained the images of ICL by using Compact Touch STS UBM and observed the position of ICL in posterior chamber and ciliary sulcus. The horizontal lines vault was measured and recorded.ResultsThere were various positions in the posterior chamber as observed by full-scale ultrasound biomicroscopy and the haptics were inserted at different positions. -Eight seven eyes (64.9%) that obtained ideal vault, 29 eyes (21.6%) had insufficient vaults and 18 eyes (13.4%) had excessive vault. The vault with various positions of haptics was in ideal range (250 μm–750 μm) almost in each group. Three eyes in this study with haptics on the top of ciliary sulcus obtained excessive vault (mean vault, 850.00 ± 70.71 μm) and one eye appeared one side haptics pushing forward the iris. Among five eyes (3.7%) with iridociliary body cysts, three eyes (60%) obtained ideal vault. One eye (0.7%) with ICL decentralization after implantation surgery had an ideal vault, but the patient had serious glare.ConclusionsThough ICL in the posterior chamber had different positions and the haptics in most cases were not in the ciliary sulcus, the postoperative vault was almost in the ideal range.

Short‐term changes in and preoperative factors affecting vaulting after posterior chamber phakic Implantable Collamer Lens implantation

“…Garcia-Feijoo et al [ 24 ] demonstrated that ICL haptics were usually ultimately located in the ciliary sulcus or ciliary body, while Choi et al [ 25 ] demonstrated that 64.7 % of phakic IOL haptics were fixated in the ciliary sulcus. However, by analysing the full-scale UBM of 134 eyes, Zhang et al [ 26 ] found that the ICL haptics in most cases were not in the ciliary sulcus and that different haptic positions had a significant influence on postoperative vaulting. For example, the eyes with haptics on the top of the ciliary sulcus were likely to have a high vault value, while those with one haptic on the ciliary process and another haptic in the ciliary body had a low vault value.…”

<p>Inter-Eye Vault Differences of Implantable Collamer Lens Measured Using Anterior Segment Optical Coherence Tomography</p>

“…This analysis would be helpful in understanding the influence of the lens resting position in the vault. 15 , 38 Regardless of this limitation, the study reports the range of differences observed in a population with postoperative stable follow-up and using the standard technique for vault assessment. It provides information about the inter-eye variability in vault and addresses the need for further research regarding the association between vault and postoperative anatomy.…”

Spontaneous rotation of a toric implantable collamer lens related to abnormal ciliary body morphology: a case report

“…Similarly, Park et al [8] revealed a case with just one of four footplates located below the ciliary sulcus occurred a rotation of TICL with an angle of 11°after surgery. Zhang et al [9] considered the main reason for the dislocation of the footplate was the surgical intrinsic drawback-blindly performed underneath the iris. We hypothesize the variation of ciliary sulcus structure is a main factor infecting the position of the footplates and the subsequent rotation of the TICL.…”