Rotational Stability after Toric Implantable Collamer Lens Implantation

Lee, Damho; Lee, Seung-Jae; Kyung, Haksu

doi:10.3341/jkos.2015.56.4.477

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Lee et al found an incidence of 1.7% of rotation in excess of 10° with 98.3% showing excellent rotational stability without decrease in visual acuity. 14 …”

Section: Discussionmentioning

confidence: 99%

Implantable collamer lens V4b and V4c for correction of high myopia

Bhandari

Karandikar

Reddy

et al. 2015

Journal of Current Ophthalmology

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PurposeTo 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.MethodsA 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. The patients were evaluated at postoperative 1,3,6, and 9 months.ResultsA total of 62 eyes of 32 patients (24.56 ± 4.8 years) underwent V4b ICL implantation (21 non-toric, 41 toric ICL-TICL) with intraoperative peripheral iridectomy (PI), and 10 eyes of 5 patients (26.13 ± 3.8 years) had implantation of V4c ICL (4 non-toric, 6 TICL). The mean preoperative manifest spherical equivalent (MSE) was −9.98 ± 2.8 D and −9.14 ± 2.4 D in the V4b and V4c groups, respectively, which reduced to postoperative values of −0.24 ± 1.3 D and −0.2 ± 1.18 D, respectively. At the end of 9 months follow-up, mean ECC loss was 6.4% and 6.1%, mean vault was 573.13 ± 241.13 μ, and 612 ± 251.14 μ, respectively, in the V4b and V4c groups. Anterior subcapsular opacities were present in 6.9% and 3.14% of eyes with V4b and V4c groups, respectively. Four eyes from V4b (9.75%) and 1 eye from V4c (16.66%) had rotation of more than 30° and required realignment surgery, which was done successfully. Two eyes (3.22%) with V4b ICL implantation had high postoperative IOP (>35 mm Hg) due to blocked PI and required Nd:Yag laser iridotomy, which was done with successful control of IOP. The safety indices were 1.11 and 1.14, and efficacy indices were 1.4 and 1.5 in the V4b and V4c groups, respectively, at the end of 9 months.ConclusionICL implantation is a safe and effective surgery for correction of high myopia. Implantation of ICL with a central hole showed negligible postoperative IOP fluctuations without a peripheral iridectomy.

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“…Lee et al found an incidence of 1.7% of rotation in excess of 10° with 98.3% showing excellent rotational stability without decrease in visual acuity. 14 …”

Section: Discussionmentioning

confidence: 99%

Implantable collamer lens V4b and V4c for correction of high myopia

Bhandari

Karandikar

Reddy

et al. 2015

Journal of Current Ophthalmology

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“…Currently, the TICL is widely used for the correction of myopic astigmatism. It has been reported as a predictable, safe, and effective treatment in correcting astigmatism [ 2 , 4 , 7 ]. In this study, we analyzed the visual acuity, refractive outcomes, and rotational stability after implantation of the V4c TICL in 112 eyes of 66 patients.…”

Section: Discussionmentioning

confidence: 99%

“…It has been reported to be more accurate and have a lower standard deviation than slit-lamp digital imaging or slit-lamp assessments [ 7 , 14 ]. In the current study, the mean rotation at 12 months was 2.75 ± 2.04°, which is similar to the results in previous studies by Damho et al (2.4 ± 3.8°) [ 7 ] and Ayman et al (2.68 ± 2.11°) [ 14 ]. The maximum TICL rotation in eyes with rotation occurred at 6 months, but there was no statistically significant difference in rotation among the time points.…”

Section: Discussionmentioning

confidence: 99%

Clinical Effect and Rotational Stability of TICL in the Treatment of Myopic Astigmatism

Zhu

et al. 2020

Journal of Ophthalmology

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Purpose. To investigate the clinical outcomes and possible risk factors associated with rotational stability after the implantation of a V4c toric implantable Collamer lens (TICL) for the correction of moderate to high myopic astigmatism. Methods. A total of 112 eyes of 66 patients with moderate to high myopic astigmatism underwent TICL implantation. All patients were followed up for more than 1 year. The uncorrected and best-corrected visual acuity (UCVA and BCVA), astigmatism and spherical equivalent, intraocular pressure, vault, endothelial cell morphometry, and rotation of the TICL axis were assessed at l day, 1 week, 1 month, 3 months, 6 months, and 12 months postoperatively. Postoperative rotation was defined as the angle between the intended axis and the achieved axis. Regression analysis was used to investigate the possible risk factors for TICL rotation postoperatively. Results. The mean efficacy index and safety index 12 months postoperatively were 1.03 ± 0.09 and 1.05 ± 0.10, respectively. All patients had the same or better visual acuity than preoperatively. The mean astigmatism value decreased from −1.86 ± 0.79 D preoperatively to −0.37 ± 0.35 D. The mean absolute axis deviation of the TICL at the last follow-up was 2.75 ± 2.04° (range, 0°∼11°). The mean manifest refraction spherical equivalent (MRSE) changed from -9.04 ± 2.67 D preoperatively to −0.67 ± 0.51 D postoperatively. The logistic regression demonstrated that the absolute degree of TICL rotation had a significant association with the fixation angle of the TICL and the size of the lens ( P = 0.003 , P = 0.026 , resp.). Conclusion. The results of our study support that TICL implantation is safe, effective, and predictable in the treatment of moderate to high myopic astigmatism, with relatively good postoperative rotational stability.

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“…Typically, rotations occur within the first week [11]. Significant rotations (> 10°) are a rare phenomenon and account for about 1.7 % of all cases [8,9]. A rotation of 15°is sufficient to induce a 50 % decrease of astigmatism reduction.…”

Section: Introductionmentioning

confidence: 99%