Factors affecting rotation of a posterior chamber collagen copolymer toric phakic intraocular lens

Mōri, Toshio; Yokoyama, Sho; Kojima, Takashi; Isogai, Naoki; Ito, Masumi; Horai, Rie; Nakamura, Tomoaki; Ichikawa, Kazuo

doi:10.1016/j.jcrs.2011.11.028

Cited by 30 publications

(13 citation statements)

References 16 publications

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“…Mori et al . [ 19 ] reported that eyes with a fixation angle of 5 degrees or more were 5.6 times more likely to have rotation than eyes with an angle less than 5 degrees; however, we could not find a correlation between adjustment angle and axis deviation in either group. This statistical results probably came from small sample size or a few cases with large adjustment angle in V4 TICL group (5 cases, range: 13.0 ~ 21.0 degree).…”

Section: Discussioncontrasting

confidence: 91%

“…[ 4 ] reported a 2.68±2.11° postoperative rotation as measured by OPD-Scan II (NIDEK co Ltd, Gamagori, Japan), and Mori et al . [ 19 ] reported a 4.82±6.98 (range: 0.0 to 47.2° mean rotation obtained by vector analysis. Even if we take into account the difference in measurement methods, the rotation of V4 and V4c TICL in the current study showed similar rotational stability.…”

Section: Discussionmentioning

confidence: 99%

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A comparison of visual outcome and rotational stability of two types of toric implantable collamer lenses (TICL) : V4 versus V4c

Hyun

Lim

et al. 2017

PLoS ONE

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PurposeTo compare the efficacy and rotational stability after implantation of two types of toric implantable collamer lenses (Toric ICL™(TICL);V4 and V4c, STAAR Surgical Co.)Study designRetrospective case series.MethodsThis retrospective study evaluated total 48 eyes of 48 patients who underwent the implantation with V4 and V4c TICL with a central hole; A twenty-four eyes of 24 patients with V4 TICL and 24 eyes of 24 patients with V4c TICL with a central hole. Visual acuity, manifest refraction, and intraocular pressure were evaluated before and after surgery. Rotational stability (disparity between the intended axis and achieved axis) was assessed in both groups using digital anterior segment photographs, and vector analysis was also performed.ResultsUncorrected visual acuity improved in both groups without significant difference (P = .111). There were no statistical differences between two groups in postoperative SE and cylindrical errors (P = .067 and .384, respectively). The mean value of rotation was 4.17±3.31° and 3.39±2.36° in the V4 and V4c TICL groups, respectively without significant difference (P = .364). Vector analysis of astigmatic correction showed no significant diffrence between two groups.ConclusionV4 and V4c TICL have similar efficacy with regard to visual acuity and refractive outcomes and rotational stability.

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Section: Discussioncontrasting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

A comparison of visual outcome and rotational stability of two types of toric implantable collamer lenses (TICL) : V4 versus V4c

Hyun

Lim

et al. 2017

PLoS ONE

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“…Although most of the postoperative patients can obtain ideal vault, excessive or insufficient vaults cannot be avoided. The vault is a dynamic range but a fixed value and is influenced by many factors such as ICL size, ICL posterior chamber position, ages, pupil size [ 18 ]. The inappropriate ICL size, especially too large ICL size, caused by the preoperative white to white inaccurate measurement usually leads to shallow anterior chamber, pigmentary loss, glaucoma and corneal endothelial loss because of the excessive vault.…”

Section: Discussionmentioning

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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“…However, outcomes with T-ICL were shown to depend upon factors such as post-operative rotation, sizing issues, and accuracy of preoperative marking 17,18. In the event of significant (>20°) and recurrent rotation in the postoperative period, realignment and often an exchange of the T-ICL are warranted 19.…”

Section: Discussionmentioning

confidence: 99%

Matched population comparison of visual outcomes and patient satisfaction between 3 modalities for the correction of low to moderate myopic astigmatism

Ganesh¹,

Brar²,

Pawar³

2017

OPTH

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PurposeTo compare toric implantable collamer lens (T-ICL), femto-LASIK, and ReLEx SMILE for the treatment of low to moderate myopic astigmatism in terms of long-term visual and refractive outcomes and predictability of astigmatic correction.Materials and methodsThe study included 30 eyes from 30 patients between the age groups of 21 and 40 years, undergoing bilateral surgery with any of the three procedures – T-ICL, femto-LASIK, or ReLEx SMILE – for correction of myopic astigmatism within the range of −3 to −8 D spherical equivalent (SE), with a minimum astigmatism of −0.75 D. Patients were followed up at day 1, 1 month, 6 months, and 1 year.ResultsAt 1 year, the mean cylinder reduced to −0.21±0.28, −0.17±0.36, and −0.22±0.28 D in the T-ICL, femto-LASIK, and ReLEx SMILE group, respectively. The predictability of astigmatism correction was comparable, with no statistically significant difference between the 3 groups (P>0.05). A total of 97% of eyes in ReLEx SMILE achieved a uncorrected distance visual acuity of 20/20 or better, compared to T-ICL (93%) and FS-LASIK (90%). However, gain in lines of corrected distant visual acuity (CDVA) was maximum in T-ICL group (60%). Four eyes in the femto-LASIK group had loss of CDVA by one line. Three eyes required exchange due to high vault and rotation of the T-ICL, which did not affect the final outcome.ConclusionAll 3 modalities were effective for myopic astigmatism at the end of 1 year. Quality of vision and patient satisfaction with T-ICL and ReLEx SMILE were similar and better than FS-LASIK. However, slight chances of postoperative rotation and exchange exist with T-ICL, which warrant thorough preoperative planning.

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Factors affecting rotation of a posterior chamber collagen copolymer toric phakic intraocular lens

Abstract: A small toric pIOL rotation occurred during the 6-month follow-up. One cause of rotation could be the intraoperative fixation angle of the toric pIOL. A toric pIOL with a minimum intraoperative fixation angle should be used to prevent postoperative rotation.

Cited by 30 publications

References 16 publications

A comparison of visual outcome and rotational stability of two types of toric implantable collamer lenses (TICL) : V4 versus V4c

A comparison of visual outcome and rotational stability of two types of toric implantable collamer lenses (TICL) : V4 versus V4c

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

Matched population comparison of visual outcomes and patient satisfaction between 3 modalities for the correction of low to moderate myopic astigmatism

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