Comparison Over Time of Vault in Chinese Eyes Receiving Implantable Contact Lenses With or Without a Central Hole

Cao, Xinfang; Wu, Weiliang; Wang, Yang; Xie, Chen; Shen, Ye

doi:10.1016/j.ajo.2016.09.016

Cited by 20 publications

(16 citation statements)

References 29 publications

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“…Since 2014, ICL V4c has been implanted in more than 60,000 eyes in the mainland of China, and the outcomes appeared to be satisfying [ 5,[12][13][14]. However, a recommended condition of ACD over 2.80 mm may restrict its use in patients with shallow ACD, a condition that is not rare in East Asian patients [ 11].…”

Section: Discussionmentioning

confidence: 99%

Visual outcomes of Visian ICL implantation for high myopia in patients with shallow anterior chamber depth

Niu

Miao

Han

et al. 2019

Preprint

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Background: High myopia with shallow anterior chamber depth (ACD less than 2.8 mm) is not rare. This observational study aims to evaluate visual outcomes after implantation of the Visian Implantable Collamer Lens with a central hole (ICL V4c) in these patients. Methods: A prospective cohort of consecutive 51 eyes of 31 patients (20 to 42 years old) was followed for at least 12 months (average 15.35 ± 4.90 months, rangers from 12 to 25 months). The preoperative ACD was 2.74 ± 0.04 mm (2.65 to 2.79 mm). Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), intraocular pressure (IOP), manifest refraction, vault, and endothelial cell density (ECD) were measured during the follow-ups after surgery. Results: All surgeries were performed safely and no complication was observed during the follow-up. At the last follow-up, the safety index (postoperative CDVA / preoperative CDVA) was 1.33 ± 0.60 and the efficacy index (postoperative UDVA / preoperative CDVA) was 1.14 ± 0.54. After the surgery, no eye had decreased CDVA and 59% (30 eyes) of the eyes gained at least one line. Forty-seven eyes (92%) were within ± 1.0 D and 35 eyes (69%) were within ± 0.5 D of the attempted refraction. The mean postoperative vault was 380.00 ± 152.84 µm (90 to 700µm). The ECD was reduced by 8.38 ± 0.06% as compared to the preoperative value (p < 0.001). No significant change was observed in IOP (p = 0.061) at the last follow-up. Ultrasound Biomicroscopy (UBM) showed none of the eyes had trabecular-iris angle closed. Conclusions: In this prospective observational study, ICL V4c implantation in patients with high myopia and shallow ACD achieved satisfying and stable visual outcomes. Its long-term safety and stability require further investigation. Trial Registration: This trial was retrospectively registered on 05/08/2018 under the number (ChiCTR1800017594)

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Section: Discussionmentioning

confidence: 99%

Visual outcomes of Visian ICL implantation for high myopia in patients with shallow anterior chamber depth

Niu

Miao

Han

et al. 2019

Preprint

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“…The recently developed V4c ICL has had good outcomes and safety for the correction of myopia and astigmatism, like previous ICL models [ 21 ]. The V4c ICL also had good visual outcomes in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…However, the acceptable vault for the V4c ICL is not clear. Cao et al [ 21 ] reported that the mean vault at 6 months was 499.7 μm in the V4c group and 495 μm in the V4 group without major complications, and that the vault decreased over time for the V4c ICL. In the present study, the mean vault of the V4c ICL at 6 months was 562.33 μm, without major complications.…”

Section: Discussionmentioning

confidence: 99%

“…Possible explanations for this abnormal over-vaulting include measurement error, individual differences in eye structure and an incorrect ICL haptic location [ 21 ]. STS-based ICL sizing is more direct and more accurate than WTW-based ICL sizing, because ICL haptic foot plates are located on the ciliary sulcus [ 17 – 20 , 24 ].…”

Section: Discussionmentioning

confidence: 99%

“…An inappropriate ICL haptic location could also cause vault prediction error. Some of the implanted ICL haptics were not ideally placed in the ciliary sulcus, and some were even in the zonular fiber [ 21 ]. Cao et al also reported V4c ICL over-vaulting cases, and no significant factors were found in such cases [ 21 , 25 ].…”

Section: Discussionmentioning

confidence: 99%

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Buffering zone of implantable Collamer lens sizing in V4c

et al. 2017

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BackgroundThe purpose of this study was to identify factors related to the unexpected vault in V4c implantable collamer lens (ICL; STAAR Surgical) implantation.MethodsV4c ICLs were implanted in 43 eyes of 43 patients for the correction of myopia. The implanted V4c ICL sizes were determined individually with our previous V4 ICL sizing nomogram based on the sulcus-to-sulcus diameter (STS), and the V4 ICL sizes were then converted to V4c ICL sizes with a size-converting table. We defined the “normal-sizing group” as having a pre-converted ICL size larger than the STS, and the “under-sizing group” as having a pre-converted ICL size smaller than the STS. Refractive outcomes, safety and parameters related to postoperative vault were compared between the two groups.ResultsThe value of “actual ICL size – STS” differed significantly between the normal-sizing and under-sizing groups (p < 0.001), but postoperative vault did not differ significantly (p = 0.442). The demographics, implanted ICL characteristics, effectiveness indexes, safety indexes, and parameters related to postoperative vault did not differ significantly between the two groups (p > 0.05). Two patients in the normal-sizing group exhibited over-vaulting; these patients had shallow anterior chambers and were implanted with high-dioptric-power ICLs.ConclusionsThe achievement of acceptable vault in both normal-sizing and under-sizing groups indicates the existence of a buffering zone in V4c ICL sizing. The smaller size of V4c ICLs should be considered in patients susceptible to over-vaulting, such as those with shallow anterior chambers and high-dioptric-power ICLs.

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Inter-eye and postoperative prediction of vault after implantation of EVO + Visian phakic implantable collamer lens

et al. 2022

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Comparison Over Time of Vault in Chinese Eyes Receiving Implantable Contact Lenses With or Without a Central Hole

Cited by 20 publications

References 29 publications

Visual outcomes of Visian ICL implantation for high myopia in patients with shallow anterior chamber depth

Visual outcomes of Visian ICL implantation for high myopia in patients with shallow anterior chamber depth

Buffering zone of implantable Collamer lens sizing in V4c

Inter-eye and postoperative prediction of vault after implantation of EVO + Visian phakic implantable collamer lens

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