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Implantable collamer lens AND central hole

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https://www.readbyqxmd.com/read/27852246/comparison-of-intraocular-pressure-andvault-after-implantation-of-implantable-collamer-lens-with-and-without-a-central-hole
#1
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
#2
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
#3
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)...
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/24427793/intraocular-pressure-during-the-early-postoperative-period-after-100-consecutive-implantations-of-posterior-chamber-phakic-intraocular-lenses-with-a-central-hole
#13
Felix Gonzalez-Lopez, Rafael Bilbao-Calabuig, Blas Mompean, Victoria de Rojas, Jorge Luezas, Mohammad Reza Djodeyre, Jaime Beltran
PURPOSE: To study changes in intraocular pressure (IOP) during the early postoperative period in eyes having implantation of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Collamer Lens V4c). SETTING: Clínica Baviera, Instituto Oftalmológico Europeo, Madrid, Spain. DESIGN: Case series. METHODS: This retrospective review included the first consecutive eyes having implantation of a spherical or toric myopic pIOL with a central hole at Clínica Baviera from December 2011 to June 2012 by the same experienced surgeon...
December 2013: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/24246374/visual-quality-comparison-of-conventional-and-hole-visian-implantable-collamer-lens-at-different-degrees-of-decentering
#14
COMPARATIVE STUDY
Cari Pérez-Vives, Teresa Ferrer-Blasco, David Madrid-Costa, Santiago García-Lázaro, Robert Montés-Micó
PURPOSE: To compare the visual quality of implantable collamer lens (ICL) with and without central hole (Hole ICL and conventional ICL) at different degrees of decentering. METHODS: An adaptive optics visual simulator (crx1, Imagine Eyes, Orsay, France) was used to simulate the -3, -6 and -12 dioptres (D) conventional and Hole ICLs in three conditions: centred and decentred 0.3 and 0.6 mm. Visual acuity (VA) at high-contrast, medium-contrast and low-contrast and contrast sensitivity (CS) were measured in 15 observers for 3 and 4...
January 2014: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/23825575/comparison-of-optical-quality-and-intraocular-scattering-after-posterior-chamber-phakic-intraocular-lens-with-and-without-a-central-hole-hole-icl-and-conventional-icl-implantation-using-the-double-pass-instrument
#15
COMPARATIVE STUDY
Kazutaka Kamiya, Kimiya Shimizu, Aya Saito, Akihito Igarashi, Hidenaga Kobashi
PURPOSE: To objectively compare the optical quality and the intraocular scattering after implantation of the posterior chamber phakic implantable collamer lens (Visian ICL™, STAAR Surgical) with and without a central artificial hole for moderate to high ametropia. METHODS: This retrospective study comprised 28 eyes of 28 consecutive patients undergoing Hole ICL implantation (mean age ± standard deviation, 30.3±5.8 years), and 24 age-matched eyes of 24 patients undergoing conventional ICL implantation (age, 30...
2013: PloS One
https://www.readbyqxmd.com/read/23688878/clinical-outcomes-after-implantation-of-a-posterior-chamber-collagen-copolymer-phakic-intraocular-lens-with-a-central-hole-for-myopic-correction
#16
José F Alfonso, Carlos Lisa, Luis Fernández-Vega Cueto, Lurdes Belda-Salmerón, David Madrid-Costa, Robert Montés-Micó
PURPOSE: To evaluate the efficacy, predictability, safety, and stability of a new-model posterior chamber Implantable Collamer Lens phakic intraocular lens (pIOL) (V4c Visian) to correct myopia. SETTING: Private practice, Oviedo, Spain. DESIGN: Case series. METHODS: This study enrolled patients who had implantation of a new pIOL design with a central hole for more natural aqueous flow, eliminating the need for neodymium:YAG iridotomy or peripheral iridectomy...
June 2013: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/23540712/optical-quality-comparison-of-conventional-and-hole-visian-implantable-collamer-lens-at-different-degrees-of-decentering
#17
COMPARATIVE STUDY
Cari Pérez-Vives, Teresa Ferrer-Blasco, David Madrid-Costa, Santiago García-Lázaro, Robert Montés-Micó
PURPOSE: To compare the optical quality of implantable Collamer lens (ICL) with and without central hole (Hole ICL and conventional ICL) at different degrees of decentering. DESIGN: Experimental laboratory investigation. METHODS: Wavefront aberrations of the -3, -6, and -12 diopter (D) V4b and -3, -6, and -12 D V4c ICLs were measured in 3 conditions-centered and decentered 0.3 and 0.6 mm-at 3-mm and 4.5-mm pupils. The root mean square of total higher order aberrations, trefoil, coma, tetrafoil, secondary astigmatism, and spherical aberration were evaluated...
July 2013: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/22818905/intraindividual-comparison-of-visual-performance-after-posterior-chamber-phakic-intraocular-lens-with-and-without-a-central-hole-implantation-for-moderate-to-high-myopia
#18
COMPARATIVE STUDY
Kimiya Shimizu, Kazutaka Kamiya, Akihito Igarashi, Tetsu Shiratani
PURPOSE: To compare postoperative visual performance after implantable Collamer lenses with and without a central hole (Hole ICL and conventional ICL) are implanted to correct moderate to high myopia. DESIGN: Prospective intraindividual comparative study. PATIENTS AND METHODS: This study evaluated 58 eyes of 29 patients with spherical equivalents of -7.55 ± 2.09 diopters (D) [mean ± standard deviation] who underwent Hole ICL implantation in one eye and conventional ICL implantation in the other eye by randomization assignment...
September 2012: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/22042291/fluid-dynamics-simulation-of-aqueous-humour-in-a-posterior-chamber-phakic-intraocular-lens-with-a-central-perforation
#19
Takushi Kawamorita, Hiroshi Uozato, Kimiya Shimizu
BACKGROUND: A modified implantable collamer lens (ICL) with a central hole (diameter, 0.36 mm), a "Hole-ICL", was created to improve aqueous humour circulation. The aim of this study was to investigate the fluid dynamic characteristics of aqueous humour in a Hole-ICL using computational fluid dynamics. METHODS: Fluid dynamics simulation using an ICL was performed with thermal-hydraulic analysis software FloEFD V5 (Mentor Graphics Corp.). For the simulation, three-dimensional eye models based on a modified Liou-Brennan model eye with conventional ICL (Model ICM, STAAR SURGICAL) and a Hole-ICL were used...
June 2012: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/21229257/modulation-transfer-function-of-intraocular-collamer-lens-with-a-central-artificial-hole
#20
Hiroshi Uozato, Kimiya Shimizu, Takushi Kawamorita, Fumiko Ohmoto
BACKGROUND: A modified implantable collamer lens (ICL) with a central hole (diameter 0.36 mm), "Hole-ICL", was created to improve aqueous humour circulation. The aim of this study is to investigate the effects of ICL power and the relationship between pupil size and modulation-transfer functions (MTFs) in a Hole-ICL in vitro. METHODS: The ICL and intraocular lens (IOL) studied were the Collamer ICL (Model ICM, STAAR Surginal) and the monofocal IOL AF-1 (VA-60BBR, HOYA)...
July 2011: Graefe's Archive for Clinical and Experimental Ophthalmology
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