Changes in Objective Vault and Effect on Vision Outcomes after Implantable Collamer Lens Implantation: 1-Year Follow-up

Du, Gaiping; Huang, Yifei; Wang, Liqiang; Wang, Dajiang; Guo, Huiling; Yu, Jifeng; Gong, Yu-Bo; Song, Jing; Huang, H D

doi:10.5301/ejo.2011.8359

Cited by 30 publications

(18 citation statements)

References 18 publications

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“…Previous studies [4, 5, 17–19, 23] investigating vault following ICL implantation have demonstrated a tendency for the vault to decrease slightly in the long term for both conventional ICLs and hole ICLs. Currently, there is limited literature available investigating changes in vault as early as 1 day following implantation of ICL V4c IOLs.…”

Section: Discussionmentioning

confidence: 98%

“…We found that the change in pupil size was a critical factor to the vault change, and postoperative vault was associated with preoperative ACD, WTW, horizontal and vertical STS in eyes implanted with ICL V4 and ICL V4c. In recent studies, rotating Scheimpflug imaging (Pentacam) [17–19], anterior segment OCT [4, 13, 20, 21], and UBM [22] have been used to measure the phakic IOL vault and have all provided accurate and reproducible measures of anterior segment biometry. In our present study, we used the rotating Scheimpflug imaging system (Pentacam) that has proved to be a repeatable measurement to evaluate the vault [17].…”

Section: Discussionmentioning

confidence: 99%

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Comparison of early changes in and factors affecting vault following posterior chamber phakic Implantable Collamer Lens implantation without and with a central hole (ICL V4 and ICL V4c)

et al. 2016

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BackgroundTo objectively compare the early changes in vault over time following implantation of an Implantable Collamer Lens without (ICL V4) and with (ICL V4c) a central hole and the respective factors affecting vault change in moderate to high myopia.MethodsThis prospective study comprised of 38 eyes of 38 patients implanted with ICL V4 and 39 eyes of 39 patients implanted with ICL V4c intraocular lenses. We quantitatively assessed the postoperative values of vault and pupil size at 1 day, 1 week, and 1 month following implantation using a rotating Scheimpflug camera (Pentacam). We compared these postoperative values within and between the two groups and identified the factors affecting vault change.ResultsThe mean vaults at 1 day, 1 week, and 1 month following ICL V4 implantation were 303.68 ± 185.11, 517.89 ± 160.07 and 521.32 ± 155.72 μm respectively, and those following ICL V4c were 316.67 ± 186.89, 495.13 ± 180.84 and 510.77 ± 175.51 μm, respectively. There was a significant difference in vault between 1 day and 1 week postoperatively. There was a significant association between the vault change and the pupil size change in both groups from 1 day to 1 month postoperatively (Pearman correlation coefficient; ICL V4: r = 0.585, P = 0.001; ICL V4c: r = 0.588, P <0.001). The vault value 1 month after implantation of ICL V4 and ICL V4c was associated with the preoperative anterior chamber depth, horizontal corneal diameter, horizontal and vertical sulcus-to-sulcus.ConclusionsPupil movement is a critical factor in vault change, with increasing vault observed postoperatively from 1 day to 1 week associated with the declining effects of pharmacological miosis and increasing pupil size. The anterior chamber depth, horizontal corneal diameter, horizontal and vertical sulcus-to-sulcus show some correlation with vault.Electronic supplementary materialThe online version of this article (doi:10.1186/s12886-016-0336-8) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Comparison of early changes in and factors affecting vault following posterior chamber phakic Implantable Collamer Lens implantation without and with a central hole (ICL V4 and ICL V4c)

et al. 2016

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“…The studies reporting vault based on WTW and ACD measurements generally employed the manufacturer’s sizing nomogram and reported data on a total of 2,263 eyes. The authors’ methods state, for example, that “size was determined based on the horizontal WTW distance and ACD, measured with the Orbscan II device following the manufacturer’s recommendations” 13 or “The ICL diameter was individually determined based on the horizontal WTW distance and ACD measured with Orbscan II (Bausch & Lomb, Rochester, NY) following the manufacturer’s recommendations” 35 or “The size of ICL was also chosen by the manufacturer based on the horizontal corneal diameter and ACD” 36 or “The size of the ICL was also chosen by the manufacturer on the basis of the horizontal corneal diameter and the ACD measured by scanning-slit topography (Orbscan IIz)”. 11 …”

Section: Reported Sizing Methodologiesmentioning

confidence: 99%

Meta-analysis and review: effectiveness, safety, and central port design of the intraocular collamer lens

Packer¹

2016

OPTH

218

198

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The purpose of this review is to summarize relevant data from publications appearing in the peer-reviewed scientific literature over the past decade since US Food and Drug Administration approval of the implantable collamer lens (ICL), and, in particular, to review studies relating to sizing methodology, safety, and effectiveness, as well as more recent studies reporting clinical outcomes of the V4c Visian ICL with KS Aquaport, VICMO. A literature search was conducted using two databases, PubMed.gov and Science.gov, to identify all articles published after 2005 related to the Visian ICL (STAAR Surgical, Inc.). Articles were examined for their relevance to sizing methodology, clinical safety, and effectiveness, and the references cited in each article were also searched for additional relevant publications. The literature review revealed that all currently reported methods of determining the best-fit size of the ICL achieve similarly satisfactory results in terms of vault, the safe distance between the crystalline lens and the ICL. Specifically, meta-analysis demonstrated that sulcus-to-sulcus and white-to-white measurement-based sizing methods do not result in clinically meaningful nor statistically significant differences in vault (two-sample two-sided t-test using pooled mean and standard deviations; t (2,594)=1.33; P=0.18). The reported rates of complications related to vault are very low, except in two case series where additional risk factors such as higher levels of myopia and older age impacted the incidence of cataract. On the basis of preclinical studies and initial clinical reports, with up to 5 years of follow-up, the new VICMO central port design holds promise for further reduction of complications. Given its safety record and the significant improvement in vision and quality of life that the ICL makes possible, the benefits of ICL implantation outweigh the risks.

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“…As we know, the ideal phakic IOL position show the optical zone located on the center of the pupil, and both haptics on the sulcus with an appropriate vault (250 μm -750 μm). Because excessive (> 750 μm) or insufficient (< 250 μm) vault lead to complications such as pigmentary loss, glaucoma or cataract, and the stability of vault becomes the major concern after ICL implantation [ 13 ]. The ICL dislocation usually results in an inappropriate vault [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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

Zhang¹,

Chen²,

Wang³

et al. 2018

BMC Ophthalmol

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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.

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Changes in Objective Vault and Effect on Vision Outcomes after Implantable Collamer Lens Implantation: 1-Year Follow-up

Abstract: Implantable Collamer lens vault over the crystalline lens had the tendency toward a slight decrease with time and did not significantly affect the vision outcome 1 year after surgery.

Cited by 30 publications

References 18 publications

Comparison of early changes in and factors affecting vault following posterior chamber phakic Implantable Collamer Lens implantation without and with a central hole (ICL V4 and ICL V4c)

Comparison of early changes in and factors affecting vault following posterior chamber phakic Implantable Collamer Lens implantation without and with a central hole (ICL V4 and ICL V4c)

Meta-analysis and review: effectiveness, safety, and central port design of the intraocular collamer lens

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

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