Comparative study of induced changes in effective lens position and refraction after Nd:YAG laser capsulotomy according to intraocular lens design

Monteiro, Tiago; Soares, Andreia; Leite, R; Franqueira, Nuno; Faria-Correia, Fernando; Vaz, Fernando

doi:10.2147/opth.s156703

Cited by 11 publications

(21 citation statements)

References 16 publications

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“…Many studies have shown that the posterior IOL movement and the hyperopic shift were associated with the larger the size of capsulotomy. 11,27,28 Further studies with larger sample size are required to confirm our results and verify whether the changes in the IOL position after YAG-PC depend in part on the corneal health status.…”

Section: Discussionmentioning

confidence: 66%

“…In contrast, Findl et al 27 reported an immediate increase in the ACD in their cohort after the YAG-PC with a more pronounced backward movement in plate-haptic IOLs than both 1-piece or 3-piece IOLs. In addition, Monteiro et al 11 reported a significant posterior movement after YAG-PC in pseudophakic eyes with C-loop acrylic hydrophobic single-piece AcrySof ® SA60AT. In our study, despite having the same IOL implanted and the insignificant difference in the energy consumed to disrupt the PCO in both groups, we report a significant backward shift of the AcrySof ® hydrophobic single-piece IOL in the FECD group versus no significant changes of the ACD in the controls 1 and 3 months after YAG-PC.…”

Section: Discussionmentioning

confidence: 99%

“…10 The standard effective treatment for PCO is Nd: YAG laser posterior capsulotomy (YAG-PC) which may be associated with complications such as a spiking intraocular pressure, pitting of IOL, uveitis, cystoid macular edema, vitreoretinal detachments, and refractive changes due to feasible axial IOL movement. 11 As one of the rare complications of laser capsulotomy in a patient with FECD, Afriat et al reported a Descemet membrane detachment in a 89-yearold man 1 day after YAG-PC laser capsulotomy. 12 The aim of this prospective case-control study was to investigate the influences of YAG-PC on corneal endothelium, central corneal thickness, and IOL position in pseudophakic eyes with FECD and posterior capsular opacification.…”

Section: Introductionmentioning

confidence: 99%

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Short-Term Anterior Segment Changes After Nd-YAG Laser Posterior Capsulotomy in Pseudophakic Eyes with Fuchs’ Endothelial Dystrophy

Eleiwa

Khedr

Fayek

et al. 2021

OPTH

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Purpose To describe the changes in the central corneal thickness (CCT), endothelial cell count (ECC), intraocular lens (IOL) position, and refractive error 1 and 3 months after Nd-YAG laser posterior capsulotomy (YAG-PC) for posterior capsular opacification (PCO) in pseudophakic eyes with Fuchs’ endothelial cell dystrophy (FECD). Design Prospective case-control. Participants Fifty pseudophakic eyes of 50 patients with visually significant PCO (25 with healthy corneas, and 25 with FECD grade 1 and 2). Methods FECD was clinically graded, and only patients without clinically evident corneal edema were included in the study (grade 1 and 2). All patients received YAG-PC and were followed up after 1 and 3 months. Best-corrected visual acuity, refractive errors, ACD, CCT, and ECC were assessed and compared between the pre-laser values and that of the 2 follow-up visits. Results In both groups, BCVA showed significant improvement (P<0.05). Compared to healthy controls, a significant hyperopic shift was observed in the FECD eyes at the 2 follow-up visits (P=0.027, and 0.019). A significant backward movement of the IOL was observed in the FECD eyes in the 2 follow-up visits (P=0.043, and 0.02). There was a significant correlation between the hyperopic shift in the FECD eyes and the ACD deepening during the 1st month (R= −0.6, P=0.001) and 3rd month (R= −0.4, P=0.04). Significant drop in the ECC was noted in both groups but without significant increase in the CCT. Conclusion Compared to controls, a hyperopic shift and backward movement of the IOL were observed in the FECD eyes after YAG-PC. No significant corneal thickening was found in both groups despite the significant drop in the ECC. Future studies are required to confirm our results and monitor the long-term changes after YAG-PC in FECD.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Short-Term Anterior Segment Changes After Nd-YAG Laser Posterior Capsulotomy in Pseudophakic Eyes with Fuchs’ Endothelial Dystrophy

Eleiwa

Khedr

Fayek

et al. 2021

OPTH

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“…This finding contradicts the results from a previous study of our group. 7 This might be because that, in that study, our group did not measure the capsulotomy size. It has been reported that a backward movement of the IOL and, therefore, a hyperopic shift may be caused by a larger capsulotomy size.…”

Section: Discussionmentioning

confidence: 86%

Intraocular Lens Position and Anterior Chamber Parameters Evaluation After Nd:YAG Laser Posterior Capsulotomy for Posterior Capsular Opacification Using Anterior Segment Swept-Source Optical Coherence Tomography

João¹,

Costa²,

Monteiro³

et al. 2022

OPTH

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Purpose To evaluate the effect of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser capsulotomy on intraocular lens (IOL) position and anterior segment parameters with a new swept-source anterior segment optical coherence tomography (AS-OCT) device (Anterion ® , Heidelberg Engineering GmbH). Patients and Methods A total of 50 eyes from 50 consecutive patients were included. All patients had visually significant posterior capsular opacification (PCO) after uneventful phacoemulsification surgery with manual capsulorhexis and single-piece C-loop acrylic IOL implantation (AcrySof ® SA60AT) and were treated with Nd:YAG laser. Anterior segment images were captured with Anterion ® in non-dilated conditions before and one month after the procedure. In the “Metrics App”, we collected data of the anterior chamber angle (ACA) 3 and 9 o’clock, the anterior chamber depth (ACD), the anterior chamber volume (ACV), and the central corneal thickness (CCT). We also collected demographic and clinical data [age, gender, months from surgery to Nd: YAG capsulotomy, pre- and post-capsulotomy corrected distance visual acuity (CDVA) and spherical equivalent, and axial length]. Results We did not find a statistically significant difference in ACD after the Nd:YAG capsulotomy (3.96 ± 0.55 vs 3.97 ± 0.55 mm, p = 0.10). In 28 patients, we noted a backward movement of the IOL; in the remaining 22, the IOL moved forward or did not change at all. We did not observe significant changes in ACA at the 3 and 9 o’clock reference points, ACV, or CCT. There was an improvement in CDVA after the procedure (0.37 ± 0.21 vs 0.12 ± 0.27 logMAR, p = 0.015), without statistically significant differences in SE (−0.15 ± 0.84 vs −0.25 ± 0,93, p = 0.42). Axial length was not correlated with ACD variations after the procedure (p = 0.67). Conclusion Our results show that Nd:YAG laser capsulotomy does not change the axial position of a single-piece C-loop acrylic IOL inside the capsular bag, as well as other anterior chamber parameters.

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“…These studies also included patients with or without tamponade. Furthermore, Nd: YAG laser posterior capsulotomy may also induce significant changes in effective lens position (Oztas et al, 2015;Monteiro et al, 2018). Therefore, we specifically excluded patients who did not receive Nd: YAG laser posterior capsulotomy.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Refractive Changes Following Pseudophakic Vitrectomy with or without Gas Tamponade

Yılmaz¹,

Yıldız

Aslanci

et al. 2021

Black Sea Journal of Health Science

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To compare refractive changes following 23-gauge (G) vitrectomy with or without gas tamponade in pseudophakic eyes. This retrospective study included patients with neodymium: yttrium-aluminum-garnet (Nd: YAG) laser capsulotomy, who underwent 23 G pars plana vitrectomy (PPV) between February 2015 and March 2019. Indications for surgery included; rhegmatogenous retinal detachment in Group 1 and epiretinal membrane or vitreous hemorrhage (VH) in Group 2. Gas tamponade 12% perflouropropane (C3F8) was used in Group 1 whereas no tamponade was used in Group 2. The minimum follow-up was 24 months for both groups. A total of 47 patients were recruited (Group 1, n=27 and Group 2, n=20). The visual acuity improvement was statistically significant in both groups (p<0.001). A statistically significant myopic shift was observed in both groups [-0.40±0.54 diopter (D) (P=0.001) in Group 1; -0.17±0.29 D (P=0.017) in Group 2]. In addition, a myopic shift greater than 1 D was observed in 2 eyes (7.4%) in Group 1. The significant hyperopic shift was detected in 3 eyes (11.1%) in Group 1 and 5 eyes (25%) in Group 2. Surgically induced astigmatism was similar between groups [0.46±0.25 D in Group 1 and 0.54±0.26 D in Group 2, (P=0.314)]. Postoperative complications included VH (n=1/27) and macular hole (n=1/27) in Group 1. The clinically significant myopic shift may occur following 23 G vitrectomy in pseudophakic eyes. Eyes with gas tamponade are more prone to myopic shift, possibly due to anterior movement of the intraocular lens. Therefore, targeting slight residual hyperopia (+0.50 D) might be suggested in patients with gas tamponade.

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Comparative study of induced changes in effective lens position and refraction after Nd:YAG laser capsulotomy according to intraocular lens design

Cited by 11 publications

References 16 publications

Short-Term Anterior Segment Changes After Nd-YAG Laser Posterior Capsulotomy in Pseudophakic Eyes with Fuchs’ Endothelial Dystrophy

Short-Term Anterior Segment Changes After Nd-YAG Laser Posterior Capsulotomy in Pseudophakic Eyes with Fuchs’ Endothelial Dystrophy

Intraocular Lens Position and Anterior Chamber Parameters Evaluation After Nd:YAG Laser Posterior Capsulotomy for Posterior Capsular Opacification Using Anterior Segment Swept-Source Optical Coherence Tomography

Comparison of Refractive Changes Following Pseudophakic Vitrectomy with or without Gas Tamponade

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