Posterior Chamber Phakic Intraocular Lens Implantation in Eyes with an Anterior Chamber Depth of Less Than 3 mm: A Multicenter Study

Kamiya, Kazutaka; Shimizu, Kimiya; Igarashi, Akihito; Kitazawa, Yoshiaki; Kojima, Takashi; Nakamura, Tomoaki; Ichikawa, Kazuo

doi:10.1038/s41598-018-31782-y

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…In another multicenter studies, we recently showed that posterior chamber phakic intraocular lens implantation offered good safety and efficacy outcomes, and yielded predictable and stable results, with no vision-threatening complications 16 – 18 . Although the degree of myopic correction is different among these studies, both SMILE and phakic intraocular lens implantation may be viable surgical options for the treatment of myopic refractive errors.…”

Section: Discussionmentioning

confidence: 98%

A Multicenter Study on Early Outcomes of Small-Incision Lenticule Extraction for Myopia

Kamiya

Takahashi

Nakamura

et al. 2019

Sci Rep

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This study was aimed to investigate the early clinical outcomes of small-incision lenticule extraction (SMILE) to correct both myopia and myopic astigmatism at major clinical centers in Japan. This case series consisted of two hundred fifty-two eyes of 130 consecutive patients who underwent SMILE surgery (29.5 ± 6.3 years, mean age ± standard deviation), with spherical equivalents of −4.33 ± 1.61 D. We determined the safety, efficacy, predictability, stability, and adverse events of this procedure. Corrected distance visual acuity significantly improved, from −0.18 ± 0.04 preoperatively to −0.19 ± 0.07 logMAR postoperatively (paired t-test, p < 0.001). Uncorrected distance visual acuity also significantly improved, from 1.05 ± 0.26 preoperatively to −0.15 ± 0.11 logMAR postoperatively (p < 0.001). 88% and 98% of eyes were within ± 0.5 and 1.0 D of the targeted correction, respectively. Changes in manifest spherical equivalent from 1 week postoperatively were 0.02 ± 0.35 D (p = 0.127). No vision-threatening complications were observed in any of the cases. SMILE performed well in the correction of myopic refractive errors, and we experienced no severe complications in this series, indicating its feasibility as a surgical option for the treatment of these eyes.

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Section: Discussionmentioning

confidence: 98%

A Multicenter Study on Early Outcomes of Small-Incision Lenticule Extraction for Myopia

Kamiya

Takahashi

Nakamura

et al. 2019

Sci Rep

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“…Furthermore, Kamiya et al implanted an intraocular lens with an anterior chamber depth of less than 3 mm and found that the postoperative corneal endothelial cell loss rate was 0.2 ± 8.7%, confirming the safety of V4c implantation even in the case of a shallow anterior chamber. They also summarized the statistical results from other studies that examined corneal endothelial cell count after ICL implantation and found that the postoperative corneal endothelial cell loss rate was between −1.1% and 8.5% [ 16 ]. In our clinical experiment, the corneal endothelial cell loss rate at 3 months in the two groups was 0.3% and 1.0%, respectively.…”

Section: Discussionmentioning

confidence: 99%

A Comparative Study of Two Types of Implantation Surgery Methods for Implantable Collamer Lenses

Liu

Dong

Chen

et al. 2021

Journal of Ophthalmology

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Purpose. To investigate the effects of two different surgical methods of implantable collamer lens (ICL) implantation on the operation time, visual outcomes, corneal endothelial cell count, and intraocular pressure (IOP). Methods. This was a contralateral eye comparison study, a total of 192 eyes from 96 patients were included, and the two eyes from the same patient were randomly assigned to two groups (group 1 and group 2, with 96 eyes in each group). In group 1, after making the corneal incision, ophthalmic viscosurgical devices (OVDs) were first injected into the anterior chamber followed by ICL implantation. In group 2, the ICL was first implanted into the anterior chamber followed by OVDs injection. The operation time, uncorrected distance visual acuity, corrected distance visual acuity, spherical equivalent, corneal endothelial cell count, and IOP were recorded and analyzed. Results. The operative time in group 1 was significantly longer than that in group 2 ( P = 0.002 < 0.05). There were significant differences between IOP measured 2 hours following surgery of the two groups ( P = 0.026 < 0.05), Furthermore, the rate of IOP change 2 hours following the operation was significantly higher in group 1 than in group 2 ( P = 0.019 < 0.05). There were significant differences in the anterior chamber angle 2 hours after surgery compared with that before surgery in both groups ( P = 0.014 < 0.05 and P = 0.029 < 0.05, respectively). No significant differences were observed in the other parameters measured (all P > 0.05). Conclusion. The two ICL implantation methods had similar clinical outcomes and effects on the corneal endothelial cell count. Additionally, the implantation of an intraocular lens prior to injecting OVDs reduces the operation time and lowers the rate of IOP rise in the early postoperative period, making it safe and effective for ICL implantation.

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“…We selected the appropriate ICL size by referring to the manufacturer’s nomogram based on the horizontal corneal diameter and anterior chamber depth using AS-OCT. We also determined the ICL power using an online calculator system provided by the manufacturer, which was based on a modified vertex formula [ 6 , 7 ].…”

Section: Methodsmentioning

confidence: 99%

“…Detailed surgical procedures have been described previously in our studies [ 6 , 7 ]. In brief, on the day of surgery, dilating and topically anesthetic agents were administered.…”

Section: Methodsmentioning

confidence: 99%

Effect of Angle Opening Parameters on Corneal Endothelial Cell Density and Intraocular Pressure after Posterior Chamber Phakic Intraocular Lens Implantation

Kamiya

Ando

Tsujisawa

et al. 2020

JCM

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This study aimed to investigate the time courses of angle opening parameters and the relationships of these with the corneal endothelial cell density (ECD) and the intraocular pressure (IOP) after posterior chamber phakic intraocular lens (Visian ICLTM, STAAR Surgical) implantation. We evaluated 116 eyes of 59 consecutive patients (mean age ± standard deviation, 34.0 ± 8.8 years) who underwent V5 implantable collamer lens (ICL) implantation. Preoperatively and 1 day, 1 week, and 1, 3, and 18 months postoperatively, we quantitatively measured the angle opening distance at 500 µm (AOD500), the trabecular-iris space area (TISA500), and the trabecular iris angle (TIA500), using anterior segment optical coherence tomography (CASIA 2, Tomey), and assessed the relationships of these measurements with ECD and IOP in ICL-implanted eyes. All angle parameters (AOD500, TISA500, and TIA500) significantly decreased 1 day postoperatively but remained stable thereafter. At 18 months postoperatively, we found no significant correlations of the angle parameters with ECD (Pearson correlation coefficient r = −0.108, p = 0.249 for AOD500; r = −0.162, p = 0.083 for TISA500; r = −0.022, p = 0.815 for TIA500) or between the angle parameters and IOP (r = −0.106, p = 0.256 for AOD500; r = −0.021, p = 0.826 for TISA500; r = −0.018, p = 0.850 for TIA500). The angle opening metrics significantly decreased immediately after ICL implantation but remained stable thereafter. Narrowing of the angle did not significantly affect ECD or IOP in ICL-implanted eyes during the 18-month postoperative period.

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Posterior Chamber Phakic Intraocular Lens Implantation in Eyes with an Anterior Chamber Depth of Less Than 3 mm: A Multicenter Study

Cited by 13 publications

References 19 publications

A Multicenter Study on Early Outcomes of Small-Incision Lenticule Extraction for Myopia

A Multicenter Study on Early Outcomes of Small-Incision Lenticule Extraction for Myopia

A Comparative Study of Two Types of Implantation Surgery Methods for Implantable Collamer Lenses

Effect of Angle Opening Parameters on Corneal Endothelial Cell Density and Intraocular Pressure after Posterior Chamber Phakic Intraocular Lens Implantation

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