Implantable Collamer Lens Sizing Method Based on Swept-Source Anterior Segment Optical Coherence Tomography

Nakamura, Tomoaki; Isogai, Naoki; Kojima, Takashi; Yoshida, Yoko; Sugiyama, Yasuo

doi:10.1016/j.ajo.2017.12.015

Cited by 106 publications

(100 citation statements)

References 24 publications

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“…34 Although the central vault did not differ between eyes with and without cysts, the average vault in eyes presenting cysts was 100 μm higher than in the eyes without cysts. Considering these arguments, the current vault prediction formulas 7 – 11 which are solely based on preoperative biometry and lens parameters, may require the introduction of additional factors characterizing the postoperative resting position of the lens. Currently, not considering the postoperative position of the ICL nor particular characteristics in the posterior chamber anatomy, the prediction of the vault in eyes with similar anatomy is limited to 81%.…”

Section: Discussionmentioning

confidence: 99%

“…The need for predicting the vault has led to the development of predictive models using biometric and lens features. 7 – 11 Despite the variety of associations put forward, the ability of explaining the vault preoperatively is limited to approximately 40% 9 , 10 and decreases to 14% if the prediction is restricted to an optimal vault range. 12 Several arguments have been presented to justify the limited predictability of the models.…”

Section: Introductionmentioning

confidence: 99%

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

Manito¹,

Trancón²,

Sierra³

et al. 2020

OPTH

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Purpose The distance between an implantable collamer lens (ICL) and the crystalline lens, namely vault, is a space regulated by the interaction of the ICL and the anatomical structures of the eye. This study analysed the differences in vault size between fellow eyes with similar anterior segment biometry. Patients and Methods A retrospective case series analysed 109 cases of patients bilaterally implanted with EVO-V4c. Patients were analysed pre- and postoperatively using anterior segment optical coherence tomography. The range of vault inter-eye differences was defined as the 95% confidence interval of the differences. Bivariate correlation was applied to seek for associations between vault inter-eye differences with biometric and lens parameters (angle-to-angle, anterior chamber depth, crystalline lens rise, central corneal thickness, central keratometry, ICL spherical equivalent, horizontal compression, postoperative pupil diameter and vault). Results Mean vault inter-eye differences were similar between fellow eyes (26.0 ± 122.5 µm). The 95% confidence interval range of the differences was ±240.1 µm, nearly 50% of the cases presented vault inter-eye differences higher than 100 µm. The vault of the first operated eye explained 81% of the variance in the second eye vault. Vault inter-eye differences were positively correlated with the level of horizontal compression and with vault magnitude. Conclusion Vaults measured in fellow eyes may present considerable differences, which can reach 25% of the common vault range. This reflects some degree of baseline variability in the vault. Clinically, these differences assume special relevance in cases where low or high vaults are expected.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Manito¹,

Trancón²,

Sierra³

et al. 2020

OPTH

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show abstract

“…Therefore, we speculated that pupil constriction due to the disappearance of the effect of the mydriatic agent played a very important role in vault reduction within 1 day after surgery. Finally, several studies have proven that the morphology of the crystalline lens also has an in uence on vault after ICL implantation [32][33][34]. ICL vault was affected by changes in crystalline lens rise (CLR) caused by accommodation or light condition changes [20,35,36].…”

Section: Discussionmentioning

confidence: 99%

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

Zhu¹,

Chen²,

Zhu³

et al. 2020

Preprint

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Background: To describe the very early changes in vault in the first month after Implantable Collamer Lens (ICL) implantation and to evaluate the effect of preoperative biometric factors on vault.Methods: A total of 83 eyes from 83 subjects with complete data who met follow-up requirements were recruited in this retrospective study between May 2019 and March 2020. We quantitatively assessed postoperative vault at 2 hours, 1 day, 1 week, and 1 month following implantation. Associations between postoperative vault and age, ICL size, spherical equivalent (SE), axial length (AL), central corneal thickness (CCT), flat K, steep K, mean K, anterior chamber depth (ACD), crystalline lens thickness (LT), white-to-white (WTW) diameter obtained by three devices, horizontal and vertical sulcus-to-sulcus (STS) diameter, bright and dark pupil sizes (BPS and DPS) and DPS-BPS were investigated using Spearman’s correlation analysis and stepwise multiple regression analysis.Results: The mean vault values at 2 hours, 1 day, 1 week, and 1 month after ICL implantation were 672.05 ± 30.72, 389.15 ± 28.33, 517.23 ± 30.76 and 530.12 ± 30.22 μm, respectively. There were significant differences in vault values between 2 hours, 1 day and 1 week after the operation. ICL size (β = 0.942; p < 0.001), followed by horizontal STS (β = -0.517; p < 0.001), crystalline LT (β = -0.376; p < 0.001) and vertical STS (β = -0.257; p = 0.017), significantly influenced vault at 1 month after the operation. The multiple regression equation was expressed as follows: central vault (μm) = -1369.05+ 657.121 × ICL size- 287.408 × horizontal STS - 432.497 × crystalline LT - 137.33 × vertical STS (adjusted R2 = 0.643).Conclusions: After ICL implantation, vault decreased and then increased, but it did not return to the vault value at 2 hours after surgery. ICL size, horizontal and vertical STS and crystalline LT were key factors for predicting postoperative vaulting.

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“…Furthermore, OCT measurements have been shown to be useful for size calculation of posterior chamber phakic lenses, such as the implantable collamer lens [35]. This may help avoid excessive vaulting of such IOLs as well as touching of the IOL to the crystalline lens.…”

Section: Ss-oct Measurements Of the Crystalline Lensmentioning

confidence: 99%

Anterior Segment OCT

Asam

Polzer

Tafreshi

et al. 2019

High Resolution Imaging in Microscopy and Ophthalmology

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Implantable Collamer Lens Sizing Method Based on Swept-Source Anterior Segment Optical Coherence Tomography

Cited by 106 publications

References 24 publications

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

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

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

Anterior Segment OCT

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Implantable Collamer Lens Sizing Method Based on Swept-Source Anterior Segment Optical Coherence Tomography

Cited by 106 publications

References 24 publications

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

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

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

Anterior Segment OCT

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