Comparision of Clinical Results of Excimer Laser Correction of Myopia and Compound Myopic Astigmatism Using VISX 20/20B isionKey™

2000 ◽  
Vol 17 (1) ◽  
pp. 55
Author(s):  
Sang Bumm Lee ◽  
Sang Bok Bae
Keyword(s):  
Excimer Laser ◽  
Clinical Results ◽  
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.

Excimer Laser Photorefractive Keratectomy for Myopia: Clinical Results in 96 Eyes

1993 ◽  
Vol 9 (2) ◽  
Author(s):  
Ionnais G Pallikaris ◽  
Ioannia E Lambropoulos ◽  
Paul K Kolydas ◽  
Nick S Nicolopoulos ◽  
Ioannis E Kotsiras
Keyword(s):  
Excimer Laser ◽  
Clinical Results ◽  
Photorefractive Keratectomy

Excimer Laser In Situ Keratomileusis to Correct Compound Myopic Astigmatism

1997 ◽  
Vol 13 (6) ◽  
pp. 511-520
Author(s):  
M Alaa El Danasoury ◽  
George O Waring ◽  
Akef El Maghraby ◽  
Kamal Mehrez
Keyword(s):  
Excimer Laser ◽  
Laser In Situ Keratomileusis ◽  
Myopic Astigmatism

Changes in Higher Order Aberrations after Wavefront-Guided Prk for Correction of Low to Moderate Myopia and Myopic Astigmatism: Two-Year Follow-Up

2007 ◽  
Vol 17 (4) ◽  
pp. 507-514 ◽  
Author(s):  
D. Wygledowska-Promienska ◽  
I. Zawojska
Keyword(s):  
Visual Acuity ◽  
Excimer Laser ◽  
Spherical Aberration ◽  
Higher Order ◽  
Control Group ◽  
Higher Order Aberrations ◽  
Order Root ◽  
Group 2 ◽  
Myopic Astigmatism ◽  
Group 1

Purpose To assess efficacy, safety, and changes in higher order aberrations after wavefront-guided photorefractive keratectomy (PRK) in comparison with conventional PRK for low to moderate myopia with myopic astigmatism using a WASCA Workstation with the MEL 70 G-Scan excimer laser. Methods A total of 126 myopic or myopic-astigmatic eyes of 112 patients were included in this retrospective study. Patients were divided into two groups: Group 1, the study group; and Group 2, the control group. Group 1 consisted of 78 eyes treated with wavefront-guided PRK. Group 2 consisted of 48 eyes treated with spherocylindrical conventional PRK. Results Two years postoperatively, in Group 1, 5% of eyes achieved an uncorrected visual acuity (UCVA) of 0.05; 69% achieved a UCVA of 0.00; 18% of eyes experienced enhanced visual acuity of −0.18 and 8% of −0.30. In Group 2, 8% of eyes achieved a UCVA of 0.1; 25% achieved a UCVA of 0.05; and 67% achieved a UCVA of 0.00 according to logMAR calculation method. Total higher-order root-mean square increased by a factor 1.18 for Group 1 and 1.6 for Group 2. There was a significant increase of coma by a factor 1.74 in Group 2 and spherical aberration by a factor 2.09 in Group 1 and 3.56 in Group 2. Conclusions The data support the safety and effectiveness of the wavefront-guided PRK using a WASCA Workstation for correction of low to moderate refractive errors. This method reduced the number of higher order aberrations induced by excimer laser surgery and improved uncorrected and spectacle-corrected visual acuity when compared to conventional PRK.

Astigmatic change 1 year after excimer laser treatment of myopia and myopic astigmatism

1996 ◽  
Vol 22 (7) ◽  
pp. 924-930 ◽  
Author(s):  
Geoffrey C. Tabin ◽  
Noel Alpins ◽  
Geoffrey F. Aldred ◽  
Catherine A. McCarty ◽  
Hugh R. Taylor ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Excimer Laser ◽  
Myopic Astigmatism

scholarly journals One-Year Visual and Refractive Outcomes following LASIK for Myopia and Myopic Astigmatism with MEL 90 versus Schwind Amaris 750S Excimer Laser: A Comparative Study

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Sheetal Brar ◽  
Dishitha P. Rathod ◽  
C. R. Roopashree ◽  
Sri Ganesh
Keyword(s):  
Comparative Study ◽  
Clinical Outcomes ◽  
Excimer Laser ◽  
Infectious Keratitis ◽  
Safety And Efficacy ◽  
Refractive Outcomes ◽  
The Mean ◽  
One Year ◽  
Myopic Astigmatism

Purpose. To compare clinical outcomes following LASIK for myopia performed with MEL 90 vs. Schwind Amaris 750S excimer laser. Methods. Data were collected retrospectively for patients who underwent Femto-LASIK, using the MEL 90 and Schwind Amaris 750S excimer laser for correction of myopia and myopic astigmatism within the range of −1.00 to −10.00 D SE from January 2013 till June 2018. Outcomes were analysed at 12 months for safety, efficacy, enhancement rate, and long-term complications. Results. A total of 328 eyes of 328 patients were analysed. One hundred and sixty-three eyes were treated with Schwind Amaris and the remaining 165 eyes with the MEL 90 laser. Twelve months postoperatively, the mean UDVA, CDVA, residual SE, and cylinder in the Amaris group were −0.10 ± 0.09 logMAR, −0.14 ± 0.06 logMAR, −0.21 ± 0.22 D, −0.13 ± 0.18 D versus −0.05 ± 0.07 logMAR, −0.09 ± 0.08 logMAR, −0.23 ± 0.23 D, and −0.14 ± 0.21 D for the MEL 90 group ( p values >0.05). For the Amaris group, safety and efficacy indices were 1.12 and 1.02, whereas for the MEL 90 group, these indices were 1.08 and 1.00, respectively. No eye in either group had any postop flap-related complications, infectious keratitis, diffuse lamellar keratitis, or keratectasia. Two eyes in the Amaris and 4 eyes in MEL 90 group required enhancement for the progression of myopia. Conclusion. At 12 months, both Schwind Amaris 750S and MEL 90 lasers demonstrated comparable clinical outcomes for myopic LASIK in a single surgeon setting.

scholarly journals Surface Ablation Techniques for Myopia – A Review of the Advances Over the Past 25 Years

2017 ◽  
Vol 11 (01) ◽  
pp. 31
Author(s):  
Jesper Hjortdal ◽  
Keyword(s):  
Excimer Laser ◽  
Clinical Results ◽  
Review Article ◽  
Ablation Techniques ◽  
Photorefractive Keratectomy ◽  
Excimer Lasers ◽  
The Past ◽  
Surface Ablation ◽  
Meta Analyses

Photorefractive keratectomy for correction of myopia was the first excimer laser-based technique to be developed. During the last 25 years, excimer lasers have improved technologically, several variations of the technique have been developed and pre- and postoperative pharmaceutical therapies have been investigated. This review article summarises these developments and the published meta-analyses on comparison of surface ablation techniques and laser in situ keratomileusis. The main conclusion is that there seem to be no differences between the clinical results obtained with the different variations of surface ablation techniques.

Excimer Laser Photorefractive Keratectomy for High Myopia and Myopic Astigmatism

1999 ◽  
Vol 30 (6) ◽  
pp. 442-448
Author(s):  
Corrado Balacco Gabrieli ◽  
Elena Pacella ◽  
Solmaz Abdolrahimzadeh ◽  
Federico Regine ◽  
Roberto Mollo
Keyword(s):  
Excimer Laser ◽  
High Myopia ◽  
Photorefractive Keratectomy ◽  
Myopic Astigmatism

Corneal Limbal Marking in the Treatment of Myopic Astigmatism with the Excimer Laser

2009 ◽  
Vol 26 (7) ◽  
pp. 505-511 ◽  
Author(s):  
Celine Bucher ◽  
Bruno Zuberbuhler ◽  
Michael Goggin ◽  
Adrian Esterman ◽  
Isaak Schipper
Keyword(s):  
Excimer Laser ◽  
Myopic Astigmatism
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