Comparative Study of Higher-Order Aberrations After Conventional Laser In Situ Keratomileusis and Laser Epithelial Keratomileusis for Myopia Using the Technolas 217z Laser Platform

2009 ◽  
Vol 147 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Caitriona Kirwan ◽  
Michael O'Keefe
Keyword(s):  
Comparative Study ◽  
Higher Order ◽  
Laser In Situ Keratomileusis ◽  
Higher Order Aberrations ◽  
Conventional Laser

Ocular Higher-Order Aberrations and Contrast Sensitivity after Conventional Laser In Situ Keratomileusis

2004 ◽  
Vol 45 (11) ◽  
pp. 3986 ◽  
Author(s):  
Nayori Yamane ◽  
Kazunori Miyata ◽  
Tomokazu Samejima ◽  
Takahiro Hiraoka ◽  
Takahiro Kiuchi ◽  
...  
Keyword(s):  
Contrast Sensitivity ◽  
Higher Order ◽  
Laser In Situ Keratomileusis ◽  
Higher Order Aberrations ◽  
Conventional Laser

Comparison of higher-order aberrations after wavefront-guided laser in situ keratomileusis and laser-assisted subepithelial keratectomy

2006 ◽  
Vol 32 (5) ◽  
pp. 779-784 ◽  
Author(s):  
So-Hyang Chung ◽  
In Sik Lee ◽  
Young Ghee Lee ◽  
Hyung Keun Lee ◽  
Eung Kweon Kim ◽  
...  
Keyword(s):  
Higher Order ◽  
Laser In Situ Keratomileusis ◽  
Higher Order Aberrations

scholarly journals Higher-order aberrations after wavefront-optimized photorefractive keratectomy and laser in situ keratomileusis

2009 ◽  
Vol 35 (2) ◽  
pp. 260-264 ◽  
Author(s):  
Bradley J. Randleman ◽  
Claudia E. Perez-Straziota ◽  
Michelle H. Hu ◽  
Alfred J. White ◽  
Evan S. Loft ◽  
...  
Keyword(s):  
Higher Order ◽  
Laser In Situ Keratomileusis ◽  
Photorefractive Keratectomy ◽  
Higher Order Aberrations

scholarly journals Comparison of healing patterns of different side-cut angulations after FS-LASIK

2021 ◽  
Vol 14 (3) ◽  
pp. 430-435
Author(s):  
Wei Wei ◽  
◽  
Di Shen ◽  
Xiao-Rui Wang ◽  
Yu-Qiang Ji ◽  
...  
Keyword(s):  
Wound Healing ◽  
Femtosecond Laser ◽  
Nerve Regeneration ◽  
Anterior Segment ◽  
Higher Order ◽  
Laser In Situ Keratomileusis ◽  
Higher Order Aberrations ◽  
Corneal Confocal Microscopy

AIM: To investigate and evaluate healing patterns around flaps made with different side-cut angulations after femtosecond laser in situ keratomileusis (FS-LASIK). METHODS: Thirty-four patients (68 eyes) received a 90° side-cut (n=34) or a 120° side-cut flaps (n=34) made with a femtosecond laser. One day, 1wk, 1 and 3mo postoperatively, side-cut scar was evaluated under slit-lamp photography according to a new grading system (Grade 0=transparent scar, 1=faint healing opacity, and 2=evident healing opacity). In vivo corneal confocal microscopy and anterior segment optical coherence tomography (AS-OCT) were used to observe wound-healing patterns around flap margin in the two groups. Sirius Scheimpflug Analyzer was also used to analyze higher order aberrations 3mo after surgery. RESULTS: There were no significant differences in flap wound-healing patterns at each follow up between the two groups (P>0.05). Three months after surgery, the flap edge scar classified as Grade 0 had excellent apposition and rapid nerve regeneration. At 3 mm and 5 mm pupil diameters, there were significant differences in trefoil aberrations between the two groups (P<0.05), but no statistically significant differences were found in total higher order aberrations (HOAs), spherical aberrations or coma in any of the pupil size conditions (P>0.05). CONCLUSION: Flap edge scars classified as Grade 0 have excellent apposition and rapid nerve regeneration, and 120° side-cut angle flaps induce less trefoil aberrations after FS-LASIK.

scholarly journals Higher-order aberrations following wavefront-guided photorefractive keratectomy and laser in situ keratomileusis

2021 ◽  
Vol 1 (2) ◽  
pp. 100-104
Author(s):  
Esra Vural ◽  
Deniz Kilic ◽  
Ayse Cicek ◽  
M. Rasit Sirem ◽  
Necati Duru ◽  
...  
Keyword(s):  
Higher Order ◽  
Laser In Situ Keratomileusis ◽  
Photorefractive Keratectomy ◽  
City Hospital ◽  
Higher Order Aberrations ◽  
Significant Difference ◽  
Manifest Refraction ◽  
Group A ◽  
The Mean

Background: We aimed to evaluate higher-order aberrations (HOAs) following wavefront-guided photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) in patients with myopia and myopic astigmatism. Methods: This retrospective observational case-control study included patients who underwent wavefront-guided PRK (40 eyes of 20 patients) or LASIK (40 eyes of 20 patients) between August 2018 and November 2018 at the refractive surgery unit of Kayseri City Hospital Eye Clinic, Turkey. The corrected distance visual acuity (CDVA), manifest refraction, corneal topography, and HOAs were evaluated preoperatively and 3 months postoperatively in all patients. Results: The mean age ± standard deviation (SD) was 27.13 ± 5.54 years and 29.10 ± 4.38 years in the PRK and LASIK groups, respectively (P = 0.06). Both groups had a mean CDVA of 1.00. The mean ± SD of spherical and spherical equivalent values was -2.09 ± 1.56 diopter (D) and -3.03 ± 1.72 D in the PRK group and -2.23 ± 1.69 D and -3.35 ± 1.71 D in the LASIK group, respectively (P = 0.58). When the preoperative and postoperative HOAs and root mean square (RMS) values (for a 6-mm pupil diameter) were compared in the PRK group, a significant difference was found in vertical coma and total RMS values (P = 0.003 and P ˂ 0.001, respectively); in the LASIK group, there was a significant difference in preoperative and postoperative vertical coma and total RMS values (P = 0.0.001 and P ˂ 0.001, respectively). There was no significant difference in preoperative and postoperative vertical coma values between the two groups (P = 0.735 and P = 0.583, respectively). Conclusions: In terms of HOAs, total RMS values decreased significantly and vertical coma values increased significantly at 3 months postoperatively in both PRK and LASIK groups. However, there were no differences between the two groups.

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