Flap thickness accuracy

Solomon, Kerry D.; Donnenfeld, Eric D.; Sandoval, Hugo; Sarraf, Oday Al; Kasper, Terrance J; Holzer, MP; Slate, Elizabeth H.; Vroman, David T

doi:10.1016/j.jcrs.2004.01.023

Cited by 89 publications

(16 citation statements)

References 18 publications

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“…1,2 The terms thick-flap LASIK and thin-flap LASIK have arisen to describe traditional microkeratome flaps (mean thickness approximately 150 μm 3 ) and those created with newer microkeratomes or a femtosecond laser (mean thickness approximately 100 μm 1,2,4–6 ), respectively.…”

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confidence: 99%

Influence of flap thickness on visual and refractive outcomes after laser in situ keratomileusis performed with a mechanical keratome

Bansal

Doherty

Randleman

et al. 2010

Journal of Cataract and Refractive Surgery

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PURPOSE To study the effect of flap thickness on visual acuity and refractive outcomes after laser in situ keratomileusis (LASIK) using 2 blade types with a mechanical microkeratome. SETTING Emory Vision, Atlanta, Georgia, USA. METHODS This retrospective analysis was of LASIK cases performed between January 2005 and June 2006 using an Amadeus I microkeratome and an ML7090 CLB blade (blade A) or a Surepass blade (blade B). Outcomes analyzed included flap thickness, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction spherical equivalent (MRSE), the enhancement rate, and surgical complications 3 months postoperatively. RESULTS Two hundred sixty-three eyes of 153 patients were analyzed; blade A was used in 158 eyes and blade B, in 105 eyes. The mean flap thickness was significantly thinner with blade A than with blade B (107 μm ± 12 [SD] versus 130 ± 20 μm) (P<.0001). There was no overall correlation with either blade between flap thickness and UDVA, CDVA, or MRSE (all r<0.2). At 3 months, there was no statistically significant difference in UDVA, CDVA, or MRSE between the 2 blade groups at 3 months (all P > .10), and there was no difference in the complication rates. CONCLUSION Flap thickness did not affect visual or refractive outcomes with a mechanical micro-keratome with either blade type. FINANCIAL DISCLAIMER No author has a financial or proprietary interest in any material or method mentioned.

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confidence: 99%

Influence of flap thickness on visual and refractive outcomes after laser in situ keratomileusis performed with a mechanical keratome

Bansal

Doherty

Randleman

et al. 2010

Journal of Cataract and Refractive Surgery

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“…Many different studies14–29 found significant variations in the flap thickness created by different types of mechanical microkeratomes. Solomon et al14 compared six models of microkeratomes (AMO Amadeus, Bausch and Lomb Hansatome, Moria Carriazo-Barraquer, Moria M2, Nidek MK2000, and Alcon Summit Krumeich-Barraquer) in a large prospective, multicenter study and found that the Amadeus 140 and the Nidek MK2000 145 produced the most consistent LASIK flap thicknesses.…”

Section: Discussionmentioning

confidence: 99%

“…Solomon et al14 compared six models of microkeratomes (AMO Amadeus, Bausch and Lomb Hansatome, Moria Carriazo-Barraquer, Moria M2, Nidek MK2000, and Alcon Summit Krumeich-Barraquer) in a large prospective, multicenter study and found that the Amadeus 140 and the Nidek MK2000 145 produced the most consistent LASIK flap thicknesses. They reported that the current microkeratomes have a reliable performance and show SDs in flap thickness between 15 and 35 µm.…”

Section: Discussionmentioning

confidence: 99%

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Corneal flap thickness with the Moria M2 single-use head 90 microkeratome in 72 consecutive LASIK procedures

Karabela

Müftüoğlu

Kaya

2017

OPTH

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PurposeThis study aimed to evaluate the accuracy and consistency of corneal flap thickness in laser-assisted in situ keratomileusis (LASIK) with the Moria M2 single-use head 90 microkeratome.MethodsThe central corneal thickness of 72 (37 right, 35 left) eyes of 37 patients was measured by ultrasonic pachymetry preoperatively and intraoperatively after flap cut. The Moria M2 single-use head 90 microkeratome was used to create a superior hinged flap in all eyes. The right eyes were always operated on before the left eyes in each patient, using the same blade in all bilateral cases. All patients underwent LASIK for myopia and/or myopic astigmatism using VISX Star S4 platform.ResultsThe mean preoperative spherical equivalent refraction was −3.55±2.30 D (range: −0.625 to −11.00 D), preoperative central corneal thickness by ultrasonic pachymetry was 541±26.82 µm (490–600 µm) and steepest K was 44.08±1.49 D (40–46.75 D) in all eyes. The mean flap thickness was 136.97±20.07 µm (106–192 µm), 131.2±19.5 µm (91–192 µm), and 134.16±19.85 µm (91–192 µm) in the right, left, and both eyes, respectively. A positive significant relationship was found between flap thickness and preoperative ultrasonic pachymetry thickness. No significant relationship was found between flap thickness and the age, preoperative spherical equivalent, and preoperative steepest K. The difference between the first and second eyes was not significant. There were no major intraoperative and postoperative complications in all eyes.ConclusionThe Moria M2 single-use head 90 microkeratome cut relatively thicker flaps than were intended. The flap thickness range was quite wide. This was a disadvantage for the accuracy and consistency of corneal flap thickness.

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“…13 Adverse events associated with the use of NSAIDs include keratitis, corneal subepithelial infiltrates, ulceration, and corneal melt. [14][15][16] Forty percent (40%) of subjects participating in clinical trials reported transient stinging and burning on instillation (U.S. Food & Drug Administration [FDA] safety sheet data) of 0.5% ketorolac. A reduced concentration of ketorolac would possibly diminish patient complaints of stinging and burning after its instillation.…”

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confidence: 99%

Evaluation of 0.4% Ketorolac Tromethamine Ophthalmic Solution Versus 0.5% Ketorolac Tromethamine Ophthalmic Solution After Phacoemulsification and Intraocular Lens Implantation

Sandoval

Castro

Vroman

et al. 2006

Journal of Ocular Pharmacology and Therapeutics

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Flap thickness accuracy

Cited by 89 publications

References 18 publications

Influence of flap thickness on visual and refractive outcomes after laser in situ keratomileusis performed with a mechanical keratome

Influence of flap thickness on visual and refractive outcomes after laser in situ keratomileusis performed with a mechanical keratome

Corneal flap thickness with the Moria M2 single-use head 90 microkeratome in 72 consecutive LASIK procedures

Evaluation of 0.4% Ketorolac Tromethamine Ophthalmic Solution Versus 0.5% Ketorolac Tromethamine Ophthalmic Solution After Phacoemulsification and Intraocular Lens Implantation

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