Comparison of Implantable Collamer Lens Visian ICL V4 and ICL V4c for high myopia

Tian, Ying; Jiang, Hai-Bo; Jiang, Jian; Wen, Dan; Xia, Xiaobo; Song, Wook

doi:10.1097/md.0000000000007294

Cited by 33 publications

(24 citation statements)

References 24 publications

(24 reference statements)

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“…The outcomes demonstrated that the quality of vision and patient satisfaction is better with ICL than with femtosecond-LASIK. Tian Y [37] and Hyun J [38] compared the differences in visual and refractive results between ICL-V4 and ICL-V4c. Both authors found that the central hole did not significantly affect the visual and refractive outcomes.…”

Section: Discussionmentioning

confidence: 99%

One-year natural course of corneal densitometry in high myopic patients after implantation of an implantable collamer lens (model V4c)

Chen

Shen

et al. 2020

BMC Ophthalmol

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Background: Corneal densitometry, which is also known as corneal backscattering, is a surrogate measure of corneal clarity. The purpose of the study was to investigate the changes in corneal densitometry (CD) after implanting an implantable collamer lens (ICL-V4c). Method: Twenty-six high myopic patients (aged 29.3 ± 6.6 years, 6 males and 20 females) who underwent ICL-V4c implantation were enrolled. Intraocular pressure (IOP), corneal topography, corneal densitometry, uncorrected distance visual acuity (UCDVA), manifest refraction, and best corrected distance visual acuity (BCDVA) were evaluated preoperatively and at 1 day, 1 week, and 1, 3, 6, and 12 months post-operatively. Endothelial cell density (ECD) was measured pre-operatively and at 3, 6, and 12 months post-operatively. The efficacy index (mean post-operative UCDVA / mean pre-operative BCDVA) and the safety index (mean post-operative BCDVA / mean pre-operative BCDVA) were evaluated at 1 month, 3 months, 6 months and 12 months post-operatively. Results: Over the annular diameters of 0-2 mm, the pre-operative densitometry values of the anterior layer, central layer, posterior layer, and total layer were 20.1 ± 2.8, 11.8 ± 1.1, 10.5 ± 0.9 and 14.1 ± 1.5, respectively. From pre-operatively to post-operative Month 12, the values changed insignificantly (P = 0.177, P = 0.153, P = 0.543 and P = 0.207, respectively). Over the annular diameters of 2-6 mm, the pre-operative mean densitometry values were 17.9 ± 2.2, 10.5 ± 0.9, and 12.6 ± 1.2, respectively. From pre-operatively to post-operative Month 12, the values decreased to 16.5 ± 2.1, 10.0 ± 0.9, and 11.9 ± 1.2, respectively, which were similar to the pre-operative values (all P > 0.05) but significantly lower than the values obtained at post-operative Day 1 (P = 0.013, P = 0.002 and P = 0.010, respectively). The densitometry value of the posterior layer over the annular diameters of 2 to 6 mm remained unchanged (from 9.4 ± 0.7 to 9.1 ± 0.7) over time (P = 0.372). The efficacy and safety indices assessed at 12 months post-operatively were 1.04 ± 0.27 and 1.19 ± 0.23, respectively. The changes in IOP and ECD values were statistically insignificant (P = 0.896 and P = 0.968, respectively). Conclusion: ICL-V4c implantation may be safe and efficient for high ametropia correction. The corneal densitometry values obtained over the annulus of 0-6 mm increased slightly from before the operation to post-operative Day 1 and then decreased gradually, which indicates that ICL-V4c implantation may not compromise corneal clarity.

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Section: Discussionmentioning

confidence: 99%

One-year natural course of corneal densitometry in high myopic patients after implantation of an implantable collamer lens (model V4c)

Chen

Shen

et al. 2020

BMC Ophthalmol

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“…Both the conventional ICL and the ICL V4c implantation procedures provide good optical and visual quality [ 16 , 19 , 24 , 26 – 28 ]. Tian et al found that the two kinds of ICL had similar efficacy of visual quality for high myopia, and also similar results in low-order aberrations, while high-order aberrations and spherical aberrations were higher after ICL V4c implantation [ 28 ]. In Kamiya’s study, the two ICLs produced similar optical quality and intraocular scattering results [ 24 ].…”

Section: Discussionmentioning

confidence: 99%

Refractive outcomes and optical quality after implantation of posterior chamber phakic implantable collamer lens with a central hole (ICL V4c)

et al. 2018

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BackgroundTo investigate refractive outcomes and optical quality after implantation of posterior chamber phakic implantable collamer lens with a central hole (ICL V4c) to correct high myopia.MethodsSixty seven eyes of 38 patients who underwent ICL V4c implantation were enrolled. The mean preoperative spherical equivalent (SE) was − 12.44 ± 3.15 D (range: − 6.63 to − 20.50 D). The refractive outcomes and optical quality of the eyes at postoperative 1 and 3 months were evaluated and compared.ResultsAt 3 months postoperatively, the mean safety and efficacy indexes were 1.33 ± 0.22 and 1.14 ± 0.23, respectively. The mean SE was − 0.32 ± 0.52 D; no patient lost 1 or more lines of corrected distance visual acuity (CDVA), 13% remained unchanged, 45% gained 1 line and 42% gained 2 or more lines. The mean modulation transfer function cutoff frequency (MTFcutoff), Strehl in two dimensions ratio, and objective scatter index (OSI) were 38.20 ± 9.96 cycles per degree, 0.21 ± 0.06, and 1.00 ± 0.73, respectively. No significant difference was found in any of the above parameters (P > 0.05) between 1 and 3 months. The postoperative intraocular pressure (IOP) did not change when compared with preoperative values (P > 0.05).ConclusionsICL V4c implantation is a safe, effective, and stable solution for high myopia. Patients will acquire high and stable postoperative optical quality. ICL V4c implantation has little influence on IOP.

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“…The 2 kinds of ICLs were reported to have similar efficacy on visual quality for high myopia. [8] Usually, much more attention has been paid to cataract formation and secondary glaucoma after the ICL implantation. [9] Less study has reported on the accommodative function after ICL implantation.…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Long

et al. 2019

Medicine

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To characterize the accommodative changes in high-myopic patients after the implantation of the Visian implantable collamer lens with a central hole (ICL V4c). This prospective study enrolled 30 patients (60 eyes) with uneventful surgery of ICL V4c implantation. Parameters including amplitude of accommodation (AA), monocular and binocular facility of accommodation (FA), positive relative accommodation (PRA), negative relative accommodation (NRA), near point convergence (NPC), accommodative response, and accommodation convergence/accommodation (AC/A) ratio were assessed before surgery, at 1 and 3 months postoperatively. Mean preoperative SE was −10.86 ± 3.87 diopter (D) (range, −6.5D to −22D), which improved to 0.27 ± 0.51D at 1 month and 0.09 ± 0.47D at 3 months after surgery ( P <.001). Significant improvements in AA, NRA, PRA, NPC, monocular, and binocular FA were seen at 1 month and 3 months postoperatively compared to the values before surgery ( P <.05), but the difference between 1 month and 3 months were not obvious ( P >.05) except for binocular FA ( P = .002). However, no significant changes were seen in either AC/A ratio or accommodative response at any postoperative follow-ups in contrast to those before surgery ( P >.05). Similar changes in accommodative function were found in patients with less myopia (> −10.00D) and those with more myopia (≤10.00D) ( P >.05). The accommodative function of eyes after the implantation of ICL V4c is enhanced and stabilizes at 1 month, except for the AC/A ratio and accommodative response. The clearer vision and increased amount of accommodation for near target account for the majority of the improvement.

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Comparison of Implantable Collamer Lens Visian ICL V4 and ICL V4c for high myopia

Cited by 33 publications

References 24 publications

One-year natural course of corneal densitometry in high myopic patients after implantation of an implantable collamer lens (model V4c)

One-year natural course of corneal densitometry in high myopic patients after implantation of an implantable collamer lens (model V4c)

Refractive outcomes and optical quality after implantation of posterior chamber phakic implantable collamer lens with a central hole (ICL V4c)

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

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