Comparing wavefront-optimized, wavefront-guided and topography-guided laser vision correction

Stonecipher, Karl; Parrish, Joseph; Stonecipher, Megan

doi:10.1097/icu.0000000000000495

Cited by 17 publications

(11 citation statements)

References 23 publications

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“…Many studies have compared the efficacy of WFO and WFG platforms for myopic correction and concluded that the two yield largely equivalent outcomes [4,17]. These studies are summarized in Table 4 [3][4][5][6][17][18][19][20][21][22][23][24]. FOZ has also been used as an effective tool for the assessment and comparison of different laser refractive surgery modalities [8,9].…”

Section: Discussionmentioning

confidence: 99%

Functional optical zone after wavefront-optimized versus wavefront-guided laser in situ keratomileusis

Elshawarby¹,

Saad²,

Helmy³

et al. 2021

Med Hypothesis Discov Innov Ophthalmol

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Background: Many studies have used functional optical zone (FOZ) as a measure to compare different refractive laser treatment modalities. However, to our knowledge, no study has compared wavefrontoptimized (WFO) and wavefront-guided (WFG) laser in situ keratomileusis (LASIK) using FOZ. We compared the FOZ after WFO versus WFG LASIK in patients with myopia and myopic astigmatism.Methods: In this prospective comparative study, we included 100 myopic eyes of 50 patients with or without astigmatism. They were divided into two groups according to the platform used: WFO or WFG femtosecond LASIK. Using Holladay’s equivalent keratometry reading (EKR) report of Pentacam HR, FOZ was defined as a zone centered on the pupil center with a standard deviation (SD) of 0.5 D, around the mean EKR. The differences in FOZ between the two platforms were analyzed at 3 months postoperatively. Visual acuity, refractive error, corneal asphericity (Q-value), and root mean square of higher-order aberrations (RMS for HOAs) were evaluated and compared.Results: The mean ± SD of patient age was 26.64 ± 5.67 years. The preoperative characteristics of the two groups were comparable (all P > 0.05). The intended optical zone (IOZ) was 6 mm in both groups. The mean laser ablation depth was significantly greater in the WFG group (18 ?m per D) than in the WFO group (16 ?m per D) (P = 0.035). At 3 months postoperatively, the mean ± SD of FOZ diameter was 4.32 ± 0.94 mm (71.99 ± 15.68% of intended optical zone) in the WFO group and 4.16 ± 1.13 mm (69.33 ± 18.78% of intended optical zone) in the WFG group, with no significant difference between the two groups (P = 0.622). The change in corneal asphericity was greater in the WFG group than in the WFO group (P = 0.034). Postoperative mean corrected and uncorrected distance visual acuity, manifest refraction, and RMS for HOAs showed no significant difference between the two groups (all P > 0.05).Conclusions: We found that WFG LASIK resulted in greater ablation depth and change in corneal asphericity than WFO LASIK at 3 months postoperatively. However, there was no significant difference in FOZ diameter, refractive error, and RMS for HOAs between the two groups. Further research is needed to confirm these findings.

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Section: Discussionmentioning

confidence: 99%

Functional optical zone after wavefront-optimized versus wavefront-guided laser in situ keratomileusis

Elshawarby¹,

Saad²,

Helmy³

et al. 2021

Med Hypothesis Discov Innov Ophthalmol

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“…6 Wavefront-optimized, wavefront-guided, and topographyguided treatments are ablation profiles available for LASIK and Trans-PRK, which could minimize the aberrations due to different principles. 67 Therefore, some articles showed similar, 62,68 or better, 66,69 aberrometric outcomes in wavefront-guided LASIK than in SMILE. When FS-LASIK was equipped with wavefrontguided ablation profiles, SMILE obtained more coma than FS-LASIK at 3-month, 69 6-month, 66 and 5-year 42 follow-up.…”

Section: Lasik Vs Smilementioning

confidence: 99%

Comparison of clinical outcomes of LASIK, Trans-PRK, and SMILE for correction of myopia

Chang

Lin

Hsu

et al. 2022

Journal of the Chinese Medical Association

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Transepithelial photorefractive keratectomy (Trans-PRK), laser-assisted in situ keratomileusis (LASIK), and small incision lenticule extraction (SMILE) are three mainstay refractive surgeries worldwide. The applicability, efficacy, safety, and predictability of these different techniques are quite similar. Trans-PRK has the strongest biostability, earliest return to normal corneal sensitivity but the longest recovery time, most uncomfortable postoperative experience, and possibility of corneal haze. LASIK possesses the fastest visual rehabilitation but the slowest corneal nerve reinnervation, and flap displacement is possibly lifelong. SMILE incurs no flap-related complications and has intermediate vision recovery time and biomechanics compared with Trans-PRK and LASIK. However, it lacks the cyclotorsion-compensation system, eye-tracking system, and customized treatment profile for high astigmatism or irregular corneal surface. This review aims to introduce the mechanisms, pros, and cons of these three types of refractive surgery. With full understanding, practitioners could advise patients on the most suitable treatment of choice.

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“…Methods of correcting vision include corrective eyeglasses, hard and soft contact lenses, ortho-correction, laser vision correction (LVC), and refractive lens exchange [ 3 , 4 ]. Despite the numerous conservative treatment methods for vision defects, LVC procedures are becoming increasingly popular [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Vision Correction and Corneal Thickness at 180-Day Follow-Up After Femtosecond Laser-Assisted In-Situ Keratomileusis (FS-LASIK), Photorefractive Keratectomy (PRK), and Small Incision Lenticule Extraction (SMILE): A Study from a Single Center in Poland of 120 Patients with Myopia

Janiszewska-Bil¹,

Czarnota-Nowakowska²,

Grabarek³

et al. 2023

Med Sci Monit

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Background This study from a single center in Poland included 120 patients with myopia, and the aim was to compare vision correction and corneal thickness at the 180-day follow-up after femtosecond laser-assisted in-situ keratomileusis (FS-LASIK), photorefractive keratectomy (PRK), or small incision lenticule extraction (SMILE). Material/Methods The effectiveness and safety of laser vision correction (LVC) procedures were evaluated by determining pre- and post-procedure uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) values on the Snell chart. Twenty patients with diagnosed mild myopia (sphere maximum −3.0 diopters D; cylinder maximum 0.5 D) were qualified for PRK surgery. Fifty patients with diagnosed intolerance (sphere maximum −6.0 D; cylinder maximum 5.0 D) were eligible for the FS-LASIK procedure. Fifty patients with diagnosed myopia (sphere maximum −6.0 D cylinder 3.5 D) were qualified for the SMILE procedure. Results Regardless of which procedure was performed, both UDVA and CDVA improved significantly postoperatively ( P <0.05). In addition, the UDVA and CDVA values were similar in the postoperative period ( P >0.05). For each procedure, the EI was no less than 0.94. Regardless of which type of LVC procedure was performed, CET at the center and 1.5 mm from the center in 4 meridians thickened, and this change was not statistically significant over the observation period ( P >0.05). Conclusions Our analysis demonstrated similar effectiveness of the 3 methods – PRK, FS-LASIK, and SMILE – in patients with mild and moderate myopia.

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Comparing wavefront-optimized, wavefront-guided and topography-guided laser vision correction

Cited by 17 publications

References 23 publications

Functional optical zone after wavefront-optimized versus wavefront-guided laser in situ keratomileusis

Functional optical zone after wavefront-optimized versus wavefront-guided laser in situ keratomileusis

Comparison of clinical outcomes of LASIK, Trans-PRK, and SMILE for correction of myopia

Comparison of Vision Correction and Corneal Thickness at 180-Day Follow-Up After Femtosecond Laser-Assisted In-Situ Keratomileusis (FS-LASIK), Photorefractive Keratectomy (PRK), and Small Incision Lenticule Extraction (SMILE): A Study from a Single Center in Poland of 120 Patients with Myopia

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