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Implantable collamer lens AND central hole

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https://www.readbyqxmd.com/read/28640145/comparison-of-implantable-collamer-lens-visian-icl-v4-and-icl-v4c-for-high-myopia-a-cohort-study
#1
COMPARATIVE STUDY
Ying Tian, Hai-Bo Jiang, Jian Jiang, Dan Wen, Xiao-Bo Xia, Wei-Tao Song
The aim of this study was to investigate the visual quality of the 2 kinds of intraocular lens: Visian implantable collamer lens (ICL) V4 and Visian ICL V4c implantations for high myopia.Twenty cases (20 eyes) with high myopia who received Visian ICL V4 implantation and 18 cases (18 eyes) with high myopia who received Visian ICL V4c implantation in our hospital from April 1, 2014 to November 31, 2016 were enrolled. In 1-month follow-up, near vision, best corrected distant visual acuity (BCVA), uncorrected distant visual acuity (UDVA), and wavefront aberrations were measured, and compensation factor was calculated...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28611132/posterior-chamber-phakic-intraocular-lens-implantation-comparative-multicentre-study-in-351-eyes-with-low-to-moderate-or-high-myopia
#2
Kazutaka Kamiya, Kimiya Shimizu, Akihito Igarashi, Yoshihiro Kitazawa, Takashi Kojima, Tomoaki Nakamura, Yoshitaka Oka, Rei Matsumoto
AIM: To compare the clinical outcomes of posterior chamber phakic intraocular lens implantation with a central hole (Hole Implantable Collamer Lens (ICL), STAAR Surgical) for low-to-moderate myopia and for high myopia. METHODS: This multicentre retrospective case series comprised 351 eyes of 351 consecutive patients undergoing ICL implantation. Eyes were divided into groups based on preoperative degree of myopia: group 1; 57 eyes, manifest spherical equivalent less than -6 dioptres (D), and group 2; 294 eyes, -6 D or more...
June 13, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28503437/comparison-of-postoperative-optical-quality-according-to-the-degree-of-decentering-of-v4c-implantable-collamer-lens
#3
Min Ji Park, Hye Min Jeon, Kyoung Heon Lee, Sang Youp Han
AIM: To evaluate the clinical outcomes of V4c implantable collamer lens (Hole ICL) implantation with regard to the optical quality assessed according to different degrees of decentering. METHODS: This included 49 eyes that received conventional ICL and 94 eyes that received Hole ICL. The eyes that received Hole ICL were divided into three groups according to the degree of decentering: group 1, central hole within 1 hole diameter (HD) from the pupil center; group 2, central hole within 1 HD to 2 HD; and group 3, central hole within 2 HD to 3 HD...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28407164/intraocular-pressure-after-implantation-of-a-phakic-collamer-intraocular-lens-with-a-central-hole
#4
Ignacio Rodríguez-Una, Pedro Pablo Rodríguez-Calvo, Luis Fernández-Vega Cueto, Carlos Lisa, Andrés Fernández-Vega Cueto, José F Alfonso
PURPOSE: To investigate the middle-term intraocular pressure (IOP) results after implantation of a posterior chamber collagen copolymer phakic intraocular lens (IOL) (V4c Visian; STAAR Surgical Co., Nidau, Switzerland) with a central hole in patients with myopia. METHODS: This retrospective study enrolled patients who had implantation of a phakic IOL with a central hole. IOP, central vault, and adverse events were evaluated 1, 3, 6, 12, and 24 months postoperatively...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28292776/comparison-of-corneal-endothelial-cell-density-and-morphology-after-posterior-chamber-phakic-intraocular-lens-implantation-with-and-without-a-central-hole
#5
Hiroyasu Goukon, Kazutaka Kamiya, Kimiya Shimizu, Akihito Igarashi
AIM: To compare the corneal endothelial cells after posterior chamber phakic intraocular lens with and without a central hole (hole implantable collamer lens (ICL) and conventional ICL) implantation for the correction of moderate to high myopia. METHODS: This retrospective study evaluated 34 eyes of 34 patients who underwent hole ICL implantation and 25 eyes of 25 patients who underwent conventional ICL implantation. Preoperatively and 3 months, and 1 and 2 years postoperatively, we compared the central corneal endothelial cell density (ECD), coefficient of variation in cell size (CV) and the percentage of hexagonal cells (HEX) between the two groups using a non-contact specular microscope (EM-3000, Tomey)...
March 14, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28222711/pseudophakic-ametropia-management-with-toric-implantable-collamer-lens-with-a-central-hole-case-report
#6
Xun Chen, Xiaoying Wang, Xingtao Zhou
BACKGROUND: To report the clinical outcomes of correcting pseudophakic ametropia using toric implantable collamer lens with a 360 um central hole (TICL V4c). CASE PRESENTATION: The right eye of a 22-year-old male patient developed high myopia after unilateral phacoemulsification and intraocular lens (IOL) implantation following traumatic cataract 16 years ago. The manifest refraction was -11.50 DS/-2.50 DC × 175 with an uncorrected distance visual acuity (UDVA) of 20/2000 and a corrected distance visual acuity (CDVA) of 20/20...
February 21, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28106892/theoretical-study-on-the-need-for-laser-iridotomy-in-an-implantable-collamer-lens-with-a-hole-using-computational-fluid-dynamics
#7
T Kawamorita, K Shimizu, N Shoji
PurposeAlthough one of the advantages of the Hole-ICL implantation is that laser iridotomy (LI) is unnecessary, the evidence have not been reported from the viewpoint of aqueous humor circulation. We investigated the effect of laser iridotomy (LI) on the fluid dynamics of aqueous humor in an implantable collamer lens (ICL) with a central hole, that is, a Hole-ICL using computational fluid dynamics.MethodsA fluid dynamics simulation was performed using the thermal-hydraulic analysis software FloEFD (Mentor Graphics Corp...
May 2017: Eye
https://www.readbyqxmd.com/read/27965890/effects-of-v4c-icl-implantation-on-myopic-patients-vision-related-daily-activities
#8
Taixiang Liu, Shaorong Linghu, Le Pan, Rong Shi
The new type implantable Collamer lens with a central hole (V4c-ICL) is widely used to treat myopia. However, halos occur in some patients after surgery. The aim is to evaluate the effect of V4c-ICL implantation on vision-related daily activities. This retrospective study included 42 patients. Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), intraocular pressure (IOP), endothelial cell density (ECD), and vault were recorded and vision-related daily activities were evaluated at 3 months after operation...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27852246/comparison-of-intraocular-pressure-andvault-after-implantation-of-implantable-collamer-lens-with-and-without-a-central-hole
#9
RANDOMIZED CONTROLLED TRIAL
Haiting Chen, Guangzeng Niu, Yuxiang Fan, Jingxue Ma
BACKGROUD: The Implantable Collamer Lens (ICL) has been used widely for refractive errors, We performed this prospective randomized comparative study to compare postoperative intraocular pressure (IOP) and vaults of the eyes implanted with conventional ICL and central hole ICL. METHODS: This study evaluated 44 eyes of 22 patients who underwent central hole ICL implantation in one eye and conventional ICL implantation in the other eye by randomization assignment...
November 16, 2016: BMC Ophthalmology
https://www.readbyqxmd.com/read/27678470/ring-shaped-dysphotopsia-associated-with-posterior-chamber-phakic-implantable-collamer-lenses-with-a-central-hole
#10
Youngsub Eom, Dae Wook Kim, Dongok Ryu, Jun-Heon Kim, Seul Ki Yang, Jong Suk Song, Sug-Whan Kim, Hyo Myung Kim
PURPOSE: To evaluate the incidence of central hole-induced ring-shaped dysphotopsia after posterior chamber phakic implantable collamer lens (ICL) with central hole (hole ICL) implantation and to investigate the causes of central hole-induced dysphotopsia. METHODS: The clinical study enrolled 29 eyes of 15 consecutive myopic patients implanted with hole ICL. The incidence of ring-shaped dysphotopsia after hole ICL implantation was evaluated. In the experimental simulation study, non-sequential ray tracing was used to construct myopic human eye models with hole ICL and ICL without a central hole (conventional ICL)...
September 28, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27604229/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
#11
Xun Chen, Huamao Miao, Rajeev Krishnan Naidu, Xiaoying Wang, Xingtao Zhou
BACKGROUND: To 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. METHODS: This 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)...
September 7, 2016: BMC Ophthalmology
https://www.readbyqxmd.com/read/27603723/computational-study-of-aqueous-humor-dynamics-assessing-the-vault-and-the-pupil-diameter-in-two-posterior-chamber-phakic-lenses
#12
José Ignacio Fernández-Vigo, Ana Macarro-Merino, Joaquín Fernández-Francos, Lucía De-Pablo-Gómez-de-Liaño, José María Martínez-de-la-Casa, Julián García-Feijóo, José Ángel Fernández-Vigo
PURPOSE: To compare the behavior of aqueous humor (AH) and analyze flow differences by comparing the volume and velocity of the flow after two different models of implantable collamer lens (ICL) placement. METHODS: Computational fluid dynamics with numerical simulation using Ansys Fluent software was performed to compare the AH flow through a peripheral iridotomy (PI), which is typically performed after implantation of a V4b lens to the central hole of a V4c lens...
September 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27603356/posterior-chamber-collagen-copolymer-phakic-intraocular-lens-with-a-central-hole-for-moderate-to-high-myopia-first-experience-in-china
#13
Xinfang Cao, Weiliang Wu, Yang Wang, Chen Xie, Jianping Tong, Ye Shen
The purpose of this article is to evaluate the clinical outcomes of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Collamer Lens V4c) for the correction of moderate to high myopia in Chinese eyes.The article is designed as a retrospective case series.This study included the first consecutive eyes that had implantation of a new pIOL design with a central hole, at our department by the same surgeon. The safety, efficacy, predictability, stability, and adverse events of the surgery were evaluated over 6 months...
September 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27239582/implantable-collamer-lens-v4b-and-v4c-for-correction-of-high-myopia
#14
Vipul Bhandari, Smitha Karandikar, Jagdeesh K Reddy, Kirti Relekar
PURPOSE: To evaluate the visual outcome and intraocular pressure changes after Visian Implantable Collamer Lens (ICL) implantation V4b and V4c (with central hole) for correction of high myopia. METHODS: A prospective, consecutive, interventional comparative case series of V4b and V4c ICL implantation was done in high myopic patients who were unsuitable for laser vision. The main outcome measures studied were uncorrected and corrected distant visual acuity (UDVA, CDVA), ICL vault, intraocular pressure (IOP), endothelial cell count (ECC), and development of subcapsular lens opacities...
September 2015: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/27057883/long-term-comparison-of-posterior-chamber-phakic-intraocular-lens-with-and-without-a-central-hole-hole-icl-and-conventional-icl-implantation-for-moderate-to-high-myopia-and-myopic-astigmatism-consort-compliant-article
#15
RANDOMIZED CONTROLLED TRIAL
Kimiya Shimizu, Kazutaka Kamiya, Akihito Igarashi, Hidenaga Kobashi
UNLABELLED: The study shows a promising next-generation surgical option for the correction of moderate to high ametropia. Hole implantable collamer lens (ICL), STAAR Surgical, is a posterior chamber phakic intraocular lens with a central artificial hole. As yet, however, no long-term comparison of the clinical results of the implantation of ICLs with and without such a hole has hitherto been conducted. A prospective, randomized, controlled trial was carried out in order to compare the long-term clinical outcomes of the implantation, in such eyes, of ICLs with and without a central artificial hole...
April 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/26895160/effect-of-hole-size-on-fluid-dynamics-of-a-posterior-chamber-phakic-intraocular-lens-with-a-central-perforation-by-using-computational-fluid-dynamics
#16
Takushi Kawamorita, Kimiya Shimizu, Nobuyuki Shoji
BACKGROUND: A modified implantable collamer lens (ICL) with a central hole with a diameter of 0.36 mm, referred to as a hole-ICL, was created to improve aqueous humour circulation. The aim of this study is to investigate the ideal hole size in a hole-ICL from the standpoint of the fluid dynamic characteristics of the aqueous humour using computational fluid dynamics. METHODS: Fluid dynamics simulation using an ICL was performed with thermal-hydraulic analysis software FloEFD V 12...
April 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/26189376/posterior-chamber-collagen-copolymer-phakic-intraocular-lens-with-a-central-hole-to-correct-myopia-one-year-follow-up
#17
Carlos Lisa, Miguel Naveiras, Belén Alfonso-Bartolozzi, Lurdes Belda-Salmerón, Robert Montés-Micó, José F Alfonso
PURPOSE: To assess the predictability, stability, efficacy, and safety of a newly developed posterior chamber phakic intraocular lens (pIOL) (model V4c Visian Implantable Collamer Lens) to correct moderate to high myopia. SETTING: Fernández-Vega Ophthalmological Institute, Oviedo, Spain. DESIGN: Prospective case series. METHODS: This study evaluated eyes that had implantation of the new pIOL model with a central hole for myopia correction...
June 2015: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/25532635/comparison-of-vault-after-implantation-of-posterior-chamber-phakic-intraocular-lens-with-and-without-a-central-hole
#18
COMPARATIVE STUDY
Kazutaka Kamiya, Kimiya Shimizu, Wakako Ando, Akihito Igarashi, Kei Iijima, Ayaka Koh
PURPOSE: To compare the vault after implantation of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Collamer Lens) with and without a central artificial hole for moderate to high ametropia. SETTING: Department of Ophthalmology, Kitasato University, Kanagawa, Japan. DESIGN: Retrospective comparative study. METHODS: The study comprised eyes of patients who had central hole pIOL implantation in 1 eye and conventional pIOL implantation in the fellow eye...
January 2015: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/25418502/evaluation-of-the-toric-implantable-collamer-lens-for-simultaneous-treatment-of-myopia-and-astigmatism
#19
REVIEW
Marianne O Price, Francis W Price
Myopic astigmatism is a prevalent condition that can be treated with spectacles, contact lenses, or laser refractive surgery. However, these treatment options have functional limitations at higher levels of refractive error. The toric implantable collamer lens is designed to treat a broad range of refractive error, generally up to -18 diopters with +1 to +6 diopters of astigmatism. Approval for a more limited treatment range of up to 15 diopters of myopia with +1 to +4 diopters of astigmatism is being sought in the US, where this device has not yet received marketing approval...
January 2015: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/24503407/comparative-study-of-2-types-of-implantable-collamer-lenses-1-with-and-1-without-a-central-artificial-hole
#20
COMPARATIVE STUDY
Tukezban Huseynova, Shu Ozaki, Tatsuya Ishizuka, Mariko Mita, Minoru Tomita
PURPOSE: To compare the outcomes between implantable collamer lenses (ICLs), 1 with and 1 without a central artificial hole. DESIGN: Comparative study. METHODS: We included 65 eyes of 65 patients with refractive error in our study. The mean manifest refraction spherical equivalent (MRSE) was -9.32 ± 4.02 diopters (range, 6.75 to -16.50 diopters). We divided patients into 2 groups based on the type of ICL used, 1 for those without a central artificial hole (Group I, 21 eyes) and 1 for those with a hole (Group II, 44 eyes)...
June 2014: American Journal of Ophthalmology
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