Long-term Comparison of Vault and Complications of Implantable Collamer Lens with and without a Central Hole for High Myopia Correction: 5 Years

2021 ◽  
pp. 1-7
Author(s):  
Xun Chen ◽  
Xuanqi Wang ◽  
Yilin Xu ◽  
Mingrui Cheng ◽  
Tian Han ◽  
...  
Keyword(s):  
High Myopia ◽  
Central Hole ◽  
Implantable Collamer Lens

scholarly journals Traumatic Dislocation of Implanted Collamer Phakic Lens: A Case Report and Review of the Literature

2014 ◽  
Vol 8 (1) ◽  
pp. 24-26 ◽  
Author(s):  
Majid Moshirfar ◽  
Brian C Stagg ◽  
Valliammai Muthappan ◽  
Shail A Vasavada
Keyword(s):  
Case Report ◽  
Blunt Trauma ◽  
High Myopia ◽  
Sudden Onset ◽  
Review Of The Literature ◽  
Implantable Collamer Lens ◽  
Traumatic Dislocation ◽  
Blurry Vision ◽  
Corneal Decompensation

Purpose : Present a case of dislocation of an Implantable Collamer Lens (ICL) that occurs after blunt trauma and review the published literature on this topic. Methods : Case report and literature review using PubMed. Results : A 44 year-old male presented to the emergency department with sudden onset of blurry vision after blunt trauma to the left eye. Three years prior, he had undergone bilateral ICL placement for high myopia. On examination, the superotemporal haptic was noted to be dislocated into the anterior chamber, but there was no endothelial touch by the dislocated lens. The patient had an associated hyphema that was medically managed, and 2 weeks after the injury, the patient underwent ICL repositioning. A review of the literature was performed and five previous cases of ICL dislocation were identified. Three of these occurred after blunt trauma. One of these cases was associated with endothelial touch and decompensation and eventually required a descement’s stripping endothelial keratoplasty (DSAEK). Conclusion : Dislocation of ICLs after blunt trauma is a rare but important potential sequela of the procedure and can lead to corneal decompensation if there is lens-endothelial touch. All patients who suffer blunt dislocation of ICL should be followed long-term after repositioning for signs of endothelial loss and dysfunction.

scholarly journals Optical Quality after Posterior Chamber Phakic Implantation of an Intraocular Lens with a Central Hole (V4c Implantable Collamer Lens) under Different Lighting Conditions

2019 ◽  
Author(s):  
Tianrui He ◽  
Yi Zhu ◽  
Jibo Zhou
Keyword(s):  
Intraocular Lens ◽  
High Myopia ◽  
Optical Quality ◽  
Central Hole ◽  
Posterior Chamber ◽  
Optical Parameters ◽  
Implantable Collamer Lens ◽  
Lighting Conditions ◽  
Significant Difference ◽  
Dark Conditions

Abstract Background The current study compared optical quality before and after implantation of a posterior chamber phakic intraocular lens with a central hole [V4c implantable collamer lens (ICL)] under bright and dark lighting conditions by means of the Optical Quality Analysis System™ (OQAS; Visiometrics, Terrassa, Spain). Methods This prospective study involved 91 eyes of 46 consecutive patients undergoing implantation of a V4c ICL (15 males and 31 females). The modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scattering index (OSI), and predicted visual acuities (PVAs; 100%, 20%, and 9%), under different lighting conditions, were measured before and 1 week, 1 month, and 3 months after surgery. Results All optical parameters showed significant improvements, at all time points, under dark condition after surgery. We observed no significant changes in PVA 9% at 1 week (P=0.12) or 1 month after surgery (P=0.08) under light condition; but all other postoperative parameters improved significantly. Comparing the two lighting conditions, the OSI decreased more under dark conditions at 1 week (P=0.02), 1 month (P=0.004), and 3 months (P=0.002), but there was no significant difference in any other parameter. In addition, patients were divided into a high myopia group (group H) and a super-high myopia group (group S), the group S improved significantly more than group H in all parameters, under both bright and dark conditions. Conclusions V4c ICL implantation improved optical quality under both bright and dark lighting conditions, and had a better ability to reduce the extent of scattering in the dark. Furthermore, group S achieved greater improvement in visual quality, which should be considered by physicians before surgery.

scholarly journals Optical Quality after Posterior Chamber Phakic Implantation of an Intraocular Lens with a Central Hole (V4c Implantable Collamer Lens) under Different Lighting Conditions

2020 ◽  
Author(s):  
Tianrui He ◽  
Yi Zhu ◽  
Jibo Zhou
Keyword(s):  
Intraocular Lens ◽  
High Myopia ◽  
Mean Value ◽  
Optical Quality ◽  
Central Hole ◽  
Posterior Chamber ◽  
Spherical Equivalent ◽  
Implantable Collamer Lens ◽  
Lighting Conditions ◽  
Dark Conditions

Abstract Background: The current study compared optical quality before and after implantation of a posterior chamber phakic intraocular lens with a central hole [V4c implantable collamer lens (ICL)] under bright and dark lighting conditions by means of the Optical Quality Analysis System™ (OQAS; Visiometrics, Terrassa, Spain). Methods: This prospective study involved 91 eyes of 46 consecutive high myopia patients (15 males and 31 females, average spherical equivalent -10.50±0.33D) undergoing implantation of a V4c ICL. The modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scattering index (OSI), and predicted visual acuities (PVAs; 100%, 20%, and 9%), under different lighting conditions, were measured before and 1 week, 1 month, and 3 months after surgery. Results: All optical parameters showed significant improvements, at all time points, under dark condition after surgery. We observed no significant changes in PVA 9% at 1 week (mean value 0.539, P=0.12) or 1 month after surgery (mean value 0.573, P=0.08) under bright condition; but all other postoperative parameters improved significantly. Comparing the two lighting conditions, the OSI decreased more under dark conditions at 1 week (P=0.02), 1 month (P=0.004), and 3 months (P=0.002), but there was no significant difference in any other parameter. In addition, patients were divided into super high myopia (group S, spherical equivalent greater than -10 D) and high myopia (group H, spherical equivalent from -6 D to -10 D), the group S improved significantly more than group H in all parameters, under both bright and dark conditions. Conclusions: V4c ICL implantation improved optical quality under both bright and dark lighting conditions, and had a better ability to reduce the extent of scattering in the dark. Furthermore, group S achieved greater improvement in visual quality, which should be considered by physicians before surgery.

scholarly journals Accommodation changes after visian implantable collamer lens with central hole for high myopia

Medicine ◽  
2019 ◽  
Vol 98 (28) ◽  
pp. e16434 ◽  
Author(s):  
Minjie Chen ◽  
Qiurong Long ◽  
Hao Gu ◽  
Jiaxu Hong
Keyword(s):  
High Myopia ◽  
Central Hole ◽  
Implantable Collamer Lens

scholarly journals Two-Year Outcomes of Visian Implantable Collamer Lens with a Central Hole for Correcting High Myopia

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Zhipeng Yan ◽  
Huamao Miao ◽  
Feng Zhao ◽  
Xiaoying Wang ◽  
Xun Chen ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
High Myopia ◽  
Imaging System ◽  
Anterior Chamber Depth ◽  
Central Hole ◽  
Implantable Collamer Lens ◽  
Chamber Volume ◽  
Anterior Chamber Volume ◽  
Icl V4c

Purpose. To investigate two-year outcomes of Visian Implantable Collamer Lens with a central hole (ICL V4c) implantation for correcting high myopia.Methods. Sixty-one eyes of 32 patients went through ICL V4c implantation. Safety, efficacy, predictability, and intraocular pressure were evaluated 2 years postoperatively. Anterior chamber volume (ACV), anterior chamber depth (ACD), anterior chamber angle width (ACAW), and vault were measured using a Scheimpflug tomography imaging system.Results. At 2 years, the spherical equivalent refraction decreased from preoperative −14.62 ± 4.29 D to −0.90 ± 0.95 D, with 79% of the eyes within ±0.50 D and 98% within ±1.00 D of the intended correction. The efficacy index was 1.03 ± 0.23, and the safety index was 1.24 ± 0.26. Corrected distance visual acuity (CDVA) remained unchanged in 23% of the eyes, 75% gained one or more lines of CDVA, and 2% lost one line. The ACV, ACD, and ACAW, respectively, decreased from 193.28 ± 29.15 mm3, 3.15 ± 0.23 mm, and 36.51 ± 6.54 degree to 112.48 ± 17.01 mm3, 2.99 ± 0.23 mm, and 22.54 ± 5.27 degree (p=0.0008,  0.008,  and  0.0003, resp.). Intraocular pressure was 15.39 ± 2.88 mmHg before surgery and was 15.86 ± 4.11 mmHg at 2 years (p=0.11).Conclusion. Implantation of ICL V4c is a safe, effective, and predictable procedure for correcting high myopia. Reduction of anterior chamber space after surgery did not induce intraocular pressure increase during the 2-year follow-up.

scholarly journals Relative position of the central hole after EVO-ICL implantation for moderate to high myopia

2019 ◽  
Author(s):  
Xiaojian He ◽  
lingling niu ◽  
Huamao Miao ◽  
feng zhao ◽  
Xingtao Zhou
Keyword(s):  
Relative Position ◽  
High Myopia ◽  
Average Distance ◽  
Anterior Segment ◽  
Central Hole ◽  
Implantable Collamer Lens ◽  
Pupil Center ◽  
Nasal Side ◽  
Temporal Side

Abstract Background: This study aimed to evaluate the relative position of the central hole (CH) of Evolution Visian Implantable Collamer Lens (EVO-ICL), the pupil center (CP), and the corneal center (CC) after implantation of EVO-ICLs for moderate to high myopia. Methods: Eighty-nine eyes of forty-nine patients with moderate to high myopia were evaluated. The mean preoperative spherical equivalent (SE) was -12.58 ± 4.13D. A routine postoperative follow-up was performed within 1–12 months. Positions of the CH of EVO-ICLs, the CP and the CC were recorded using a slit lamp anterior segment photography system, and their relative distances were calculated with the Visio image analysis software. Results: All surgeries were performed safely, and no complications were observed in follow-ups after a mean 4.3 ± 4.82 months. At the last follow-up, the safety index (postoperative CDVA/preoperative CDVA) was 1.23 ± 0.48, and the efficacy index (postoperative UDVA/preoperative CDVA) was 1.08 ± 0.31. The CH in 85 eyes (95.51%) was superior to the CC, with 47.19% (42/89) on the temporal side and 48.31% (43/89) on the nasal side. The CH in 84 eyes (94.38%) was located on the temporal side of the CP, with 56.18% (50/89) superior and 38.2% (34/89) inferior to the CP. The CP of eighty-five eyes (95.51%) was superior on the nasal side of the CC. On the defined x-axis, the average distance from the CH to CC was significantly shorter than the average distance from the CP to CC (p < 0.001). Conclusions: An imperfect mismatch between the central hole of EVO-ICLs and the pupil center does not necessarily indicate ICL dislocation. Compared to the pupil center, the position of the central hole of EVO-ICL is closer to the corneal center.

scholarly journals Relative position of the central hole after EVO-ICL implantation for moderate to high myopia

2020 ◽  
Author(s):  
Xiaojian He ◽  
lingling niu ◽  
Huamao Miao ◽  
feng zhao ◽  
Xingtao Zhou
Keyword(s):  
Relative Position ◽  
High Myopia ◽  
Average Distance ◽  
Anterior Segment ◽  
Central Hole ◽  
Implantable Collamer Lens ◽  
Pupil Center ◽  
Nasal Side ◽  
Temporal Side

Abstract Background: This study aimed to evaluate the relative position of the central hole (C H ) of EVO Implantable Collamer Lens (EVO-ICL), the pupil center (C P ), and the corneal center (C C ) after implantation of EVO-ICLs for moderate to high myopia. Methods: Eighty-nine eyes of forty-seven patients with moderate to high myopia were evaluated. The mean preoperative spherical equivalent (SE) was -12.58 ± 4.13D. A routine postoperative follow-up was performed within 1~12 months. Positions of the C H of EVO-ICLs, the C P and the C C were recorded using a slit lamp anterior segment photography system, and their relative distances were calculated with the Visio image analysis software. Results: All surgeries were performed safely, and no complications were observed in follow-ups 4.3 ± 4.82 months after surgery. At the last follow-up, the safety index (postoperative CDVA/preoperative CDVA) was 1.23 ± 0.48, and the efficacy index (postoperative UDVA/preoperative CDVA) was 1.08 ± 0.31. The C H in 85 eyes (95.51%) was superior to the C C , with 47.19% (42/89) on the temporal side and 48.31% (43/89) on the nasal side. The C H in 84 eyes (94.38%) was located on the temporal side of the C P , with 56.18% (50/89) superior and 38.2% (34/89) inferior to the C P . The C P of eighty-five eyes (95.51%) was superior on the nasal side of the C C . On the defined x-axis, the average distance from the C H to C C was significantly shorter than the average distance from the C P to C C ( p < 0.001). Conclusions: An imperfect mismatch between the central hole of EVO-ICLs and the pupil center does not necessarily indicate ICL dislocation. Compared to the pupil center, the position of the central hole of EVO-ICL is closer to the corneal center.

scholarly journals Long-Term Outcomes of Retinal Detachment in Phakic Eyes After Implantation of Implantable Collamer Lens V4c for High Myopia Correction

2020 ◽  
Vol 7 ◽  
Author(s):  
Weiwei Xu ◽  
Zhou Song ◽  
Yifei Huang ◽  
Ye Tao ◽  
Junqing Wang ◽  
...  
Keyword(s):  
Retinal Detachment ◽  
High Myopia ◽  
Statistical Difference ◽  
Anterior Chamber Depth ◽  
First Year ◽  
Implantable Collamer Lens ◽  
Uncorrected Distance Visual Acuity ◽  
Spherical Equivalent Refraction ◽  
Axis Length

Aim: To estimate whether implantable collamer lens (V4c ICL) implantation increases the risk of retinal detachment in high myopia comparing with myopes with Rigid Gas-Permeable (RGP) correction.Methods: This prospective study was comprised of an ICL group (704 eyes) and an RGP group (628 eyes). Patients were enrolled according to the inclusion criteria and exclusion criteria, then divided into the ICL group and RGP group. Patients in the ICL and RGP groups received V4c ICL implantation and RGP fitting respectively. Retinal details, spherical equivalent refraction (SE), uncorrected distance visual acuity (UDVA), corrected distance vision acutivity (CDVA), axis length (AL), anterior chamber depth (ACD) and other relevant parameters were recorded at different time points. Rhegmatogenous retinal detachment (RRD) morbidity and incidence, RRD morphology and relevant parameters were analyzed.Results: All enrolled patients were followed for 3–6 years. Patients characteristics before the refractive procedure did not show a statistical difference. At the end of the follow up, all the RD cases were RRD. The RRD morbidity of the ICL group and RGP group was 1.99% (14 eyes) and 0.96% (6 eyes) respectively, which did not show statistical difference (P = 0.12). During the first year after refractive procedure, the RRD incidence of the ICL group was 0.85% (6/704), while this number of the RGP group was 0.16% (1/628). It did not show statistical difference (P = 0.08).Conclusion: Compared with RGP fitting, V4c ICL implantation for high myopia correction does not add RRD risk in the long term. V4c ICL implantation is a safe method for high myopia correction.

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