Myopic astigmatism correction: comparison of a Toric Implantable Collamer Lens and a bioptics technique by an adaptive optics visual simulator

2013 ◽  
Vol 33 (2) ◽  
pp. 114-122 ◽  
Author(s):  
Cari Pérez-Vives ◽  
Alberto Domínguez-Vicent ◽  
David Madrid-Costa ◽  
Teresa Ferrer-Blasco ◽  
Robert Montés-Micó
Keyword(s):  
Adaptive Optics ◽  
Implantable Collamer Lens ◽  
Astigmatism Correction ◽  
Myopic Astigmatism

Vector analysis of small incision lenticule extraction and toric implantable collamer lens implantation for astigmatism correction

2020 ◽  
pp. 112067212093060
Author(s):  
Ting Wan ◽  
Houfa Yin ◽  
Zhiyi Wu ◽  
Yabo Yang
Keyword(s):  
Vector Analysis ◽  
Small Incision Lenticule Extraction ◽  
Implantable Collamer Lens ◽  
Small Incision ◽  
Astigmatism Correction ◽  
Induced Astigmatism ◽  
Lenticule Extraction ◽  
The Difference ◽  
Surgically Induced ◽  
Myopic Astigmatism

Objectives: To compare the efficacy of small incision lenticule extraction (SMILE) and toric implantable collamer lens (TICL) implantation for myopic astigmatism correction using vector analysis. Methods: In this retrospective study, 171 eyes of 171 patients with cylinder ⩾1.0 diopters (D) were recruited, with 97 eyes underwent SMILE and 74 eyes underwent TICL implantation. Preoperative and 3-months postoperative visual and refractive results were examined. The astigmatism correction, graded by the degree of preoperative cylinder was compared between two groups using vector analysis. Results: At 3-months postoperatively, the residual cylinder was −0.10 ± 0.21 D in the SMILE group and −0.30 ± 0.32 D in the TCL group ( p < 0.05). Furthermore, 98% and 85% of eyes had the cylinder within ±0.5 D in the SMILE and TICL group, respectively. The vector analysis revealed similar target induced astigmatism vector in two groups. However, the difference vector, magnitude of error, angle of error, and index of success were significantly higher (0.30 ± 0.32 D, −0.19 ± 0.25, −2° ± 4.35°, and 0.16 ± 0.17 D, respectively) in the TICL group than the values in the SMILE group (0.10 ± 0.21 D, −0.05 ± 0.20, −0.03° ± 2.13°, and 0.05 ± 0.12, respectively), regardless of the degree of preoperative cylinder (all p < 0.05). For preoperative cylinder < 2.0 D, surgically induced astigmatism vector and correction index in the SMILE group were higher than those in the TICL group ( p < 0.05). Conclusion: Both SMILE and TICL implantation are effective techniques for myopic astigmatism correction. However, the accuracy of correction in the magnitude and axis of astigmatism with SMILE was better than that achieved with TICL implantation.

scholarly journals Toric Implantable Collamer Lens for the Treatment of Myopic Astigmatism

2021 ◽  
Vol Volume 15 ◽  
pp. 2893-2906
Author(s):  
Majid Moshirfar ◽  
Nour Bundogji ◽  
Alyson N Tukan ◽  
James H Ellis ◽  
Shannon E McCabe ◽  
...  
Keyword(s):  
Implantable Collamer Lens ◽  
Myopic Astigmatism

scholarly journals Posterior-Chamber Phakic Intraocular Lens Implantation in Patients over 40 Years of Age

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Pedro Tañá-Rivero ◽  
Francisco Pastor-Pascual ◽  
Marceliano Crespo ◽  
José L. Rodríguez-Prats ◽  
José J. Muñoz-Tomás ◽  
...  
Keyword(s):  
Crystalline Lens ◽  
Posterior Chamber ◽  
Spherical Equivalent ◽  
Efficacy And Safety ◽  
Phakic Intraocular Lens ◽  
Implantable Collamer Lens ◽  
Lens Implantation ◽  
Over 40 Years ◽  
Myopic Astigmatism

Purpose. To assess the efficacy, safety, and predictability of the Visian Implantable Collamer Lens (ICL) model having a central port in patients over 40 years of age. Methods. This study included 33 eyes from 21 patients who underwent V4c ICL implantation for the correction of myopia and myopic astigmatism. We assessed uncorrected (UDVA) and corrected (CDVA) distance visual acuity, refraction, intraocular pressure (IOP), endothelial cell density (ECD), vault, and adverse events occurring over a 1-year period. Results. Mean age of the patients at the time of implantation was 43.52 ± 4.49 years (range: 40 to 56 years). Efficacy and safety indexes were 1 and 1.09, respectively. Surgical outcomes for CDVA were as follows: no eye lost any lines, 19 eyes (57.58%) showed no CDVA changes, 7 eyes (21.21%) gained 1 line, 4 eyes (12.12%) gained 2 lines, and 3 eyes (9.09%) gained ≥3 lines. Mean postoperative spherical equivalent (SE) was −0.09 ± 0.47 D. A total of 29 eyes (87.8%) were within ±0.50 D and 31 eyes (93.9%) were within ±1.00 D of the desired SE. At 1-year, mean IOP was 15.27 ± 3.03 mmHg (range: 9 to 20 mmHg, p=0.12 pre vs. post) and mean ECD was 2516 ± 234 cells/mm2 (p=0.29 pre vs. post). Mean postoperative vault was 320 ± 136 μm, with 201–300 μm being the most prevalent vault range for 9 eyes (31.03%). None of the eyes showed a vault >701 μm. There were neither intraoperative nor postoperative complications; in fact, all ICL implantation procedures were uneventful. Conclusions. Our study’s findings support the use of this lens in patients over 40 years of age. A long follow-up period is advisable to monitor ICL position relative to the crystalline lens.

Photorefractive keratectomy for myopia and myopic astigmatism correction using the WaveLight Allegretto Wave Eye-Q excimer laser system

2013 ◽  
Vol 34 (3) ◽  
pp. 477-484 ◽  
Author(s):  
Esmeralda Costa ◽  
Nuno Franqueira ◽  
Andreia M. Rosa ◽  
Cristina Tavares ◽  
Maria J. Quadrado ◽  
...  
Keyword(s):  
Excimer Laser ◽  
Laser System ◽  
Photorefractive Keratectomy ◽  
Astigmatism Correction ◽  
Myopic Astigmatism

Comparison of the Toric Implantable Collamer Lens and Bioptics for Myopic Astigmatism

2010 ◽  
Vol 27 (2) ◽  
pp. 91-97 ◽  
Author(s):  
Sung-Ho Choi ◽  
Myoung-Ok Lee ◽  
Eui-Sang Chung ◽  
Tae-Young Chung
Keyword(s):  
Implantable Collamer Lens ◽  
Myopic Astigmatism

Visian Toric Implantable Collamer Lens for Correction of Compound Myopic Astigmatism

2010 ◽  
Vol 26 (4) ◽  
pp. 251-258 ◽  
Author(s):  
Daniel Elies ◽  
Tirso Alonso ◽  
Javier Puig ◽  
Oscar Gris ◽  
José Luís Güell ◽  
...  
Keyword(s):  
Implantable Collamer Lens ◽  
Myopic Astigmatism

scholarly journals Outcomes of LASIK for Myopia or Myopic Astigmatism Correction with the FS200 Femtosecond Laser and EX500 Excimer Laser Platform

2018 ◽  
Vol 12 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Muanploy Niparugs ◽  
Napaporn Tananuvat ◽  
Winai Chaidaroon ◽  
Chulaluck Tangmonkongvoragul ◽  
Somsanguan Ausayakhun
Keyword(s):  
Visual Acuity ◽  
Femtosecond Laser ◽  
Excimer Laser ◽  
Clinical Results ◽  
Laser In Situ Keratomileusis ◽  
Distance Visual Acuity ◽  
Astigmatism Correction ◽  
Full Correction ◽  
One Year ◽  
Myopic Astigmatism

Purpose: To evaluate the efficacy, predictability, stability and safety of laser in situ keratomileusis (LASIK) using the FS200 femtosecond laser and EX500 excimer laser platform. Methods: The outcomes of 254 eyes of 129 consecutive patients with myopia or myopic astigmatism who underwent full correction femtosecond laser-assisted LASIK at CMU LASIK Center were assessed. Pre-operative and post-operative parameters including manifest refraction, Uncorrected Distance Visual Acuity (UDVA), Best Corrected Distance Visual Acuity (BDVA), corneal topography and tomography were analyzed. The results between low to moderate myopia and high myopia were compared up to 12 months. Results: Mean pre-operative Spherical Equivalent (SE) was -5.15±2.41 Diopters (D) (range -0.50 to -11.50 D) and -0.13±0.28 D, -0.13±0.27 D, -0.13±0.28 D and -0.14±0.30 D at 1, 3, 6, and 12 months, post-operatively. At 12 months, the propor¬tion of eyes achieving UDVA ≥ 20/20 was 90.0% and ≥20/40 was 98.8%. The proportion of eyes achieving post-operative mean SE ±0.5 D, and ±1 D was 91.3%, and 98.5%. No eyes lost more than two lines of BDVA. The low to moderate myopic group had a statistically significant better UDVA at one (p=0.017) and three months (p=0.014) but no difference at six (p=0.061) and 12 months (p=0.091). The mean post-operative SE was better in low to moderate myopic group at every follow-up visit (p=0.001, 0.007, <0.001 and <0.001). Conclusion: One-year clinical results of LASIK with the FS200 femtosecond laser and EX500 excimer laser showed high efficacy, predictability, stability and safety.

Sign in / Sign up

Export Citation Format

Share Document