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Abstract

Purpose

To analyze and compare higher-order aberrations (HOAs) in cases of laser in situ keratomileusis (LASIK) flaps made using the Moria M2 disposable 130-μm head with those made using the 90-μm head.

Methods

Consecutive prospective comparative clinical trial. Ninety-four consecutive eyes of 48 patients were enrolled in this study. They were divided into two equal groups of 47 eyes that underwent wavefront-guided LASIK using VISX CustomVue (VISX, Santa Clara, CA) system. Corneal flap was created using the disposable Moria M2 130 μm in the first group and the 90 μm head in the second one. All patients were followed up for 6 months. Wavefront aberrations were measured at baseline, 1 month, and 6 months after surgery using the WaveScan (VISX Inc.) aberrometer. Root mean square (RMS) of HOAs, coma, and spherical aberration (SA) values were analyzed and compared in the two groups.

Results

At 6 months, values of RMS of HOAs, coma, and SA obtained from the 130–μm head group were 0.32±0.10 μm, 0.20±0.11 μm, and 0.18±0.08 μm, respectively. Values of RMS of HOAs, coma, and SA obtained from 90–μm head group were 0.33±0.12 μm, 0.19±0.10 μm, and 0.15±0.08 μm, respectively. Analyzing the data obtained revealed no statistically significant differences between the two groups. In each group, there was a significant decay of higher-order RMS and coma values from 1 month to 6 months.

Conclusions

HOAs following use of Moria M2 disposable 90 μm head are similar to those arising following use of the 130 μm.

Keywords

Higher-order aberrations RMS Coma Spherical aberrations Thin-flap LASIK

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References

Lin

R.T.

, Lu

, Wang

L.L.

Safety of laser in situ keratomileusis performed under ultra-thin corneal flaps. J Refract Surg 2003; 19(suppl): S231–6.

Dougherty

P.J.

The thin-flap LASIK technique. J Refract Surg 2005; 21(suppl): S650–4.

Kymionis

G.D.

, Tsiklis

, Pallikaris

A.I.

Long-term results of superficial laser in situ keratomileusis after ultrathin flap creation. J Cataract Refract Surg 2006; 32: 1276–80.

Duffey

R.J.

Thin flap laser in situ keratomileusis: flap dimensions with the Moria LSK-One manual microkeratome using the 100-microm head. J Cataract Refract Surg 2005; 31: 1159–62.

Khachikian

S.S.

, Morason

R.T.

, Belin

M.W.

Thin head and single use microkeratomes reduce epithelial defects during LASIK. J Refract Surg 2006; 22: 482–5.

Prandi

, Baviera

, Morcillo

Influence of flap thickness on results of laser in situ keratomileusis for myopia. J Refract Surg 2004; 20: 790–6.

Doane

J.F.

The role of thin-flap LASIK for the treatment of high myopia. In: Probst

L.E.

, ed. LASIK: Advances, Controversies, and Custom. Thorofare, NJ: Slack, 2004; 319–23.

Chayet

The pros of doing ultra-thin flaps in LASIK. In: Probst

L.E.

, ed. LASIK: Advances, Controversies, and Custom. Thorofare, NJ: Slack, 2004; 333.

Cobo-Soriano

, Calvo

M.A.

, Beltran

Thin flap laser in situ keratomileusis: analysis of contrast sensitivity, visual, and refractive outcomes. J Cataract Refract Surg 2005; 31: 1357–65.

10.

Leaming

D.V.

Practice styles and preferences of ASCRS members-2000 survey. J Cataract Refract Surg 2001; 27: 948–55.

11.

Seiler

, Koufala

, Richter

Iatrogenic keratectasia after laser in situ keratomileusis. J Refract Surg 1998; 14: 312–7.

12.

Pallikaris

I.G.

, Kymionis

G.D.

, Astyrakakis

N.I.

Corneal ectasia induced by laser in situ keratomileusis. J Cataract Refract Surg 2001; 27: 1796–802.

13.

Scerrati

Laser in situ keratomileusis vs. laser-assisted subepithelial keratectomy (LASIK vs. LASEK). J Refract Surg 2001; 17(suppl): S219–21.

14.

Kornilovsky

I.M.

Clinical results after laser-assisted subepithelial keratectomy (LASEK). J Refract Surg 2001; 17: S222–3.

15.

Pallikaris

I.G.

, Katsanevaki

V.J.

, Kalyvianaki

M.I.

Advances in subepithelial excimer refractive surgery techniques: Epi-LASIK. Curr Opin Ophthalmol 2003; 14: 207–12.

16.

Pallikaris

I.G.

, Kalyvianaki

M.I.

, Katsanevaki

V.J.

Epi-LASIK: preliminary clinical results of an alternative surface ablation procedure. J Cataract Refract Surg 2005; 31: 879–85.

17.

Shahinian

Jr. . Laser-assisted subepithelial keratectomy for low to high myopia and astigmatism. J Cataract Refract Surg 2002; 28: 1334–42.

18.

Dastjerdi

M.H.

, Soong

H.K.

LASEK (laser-assisted subepithelial keratectomy). Curr Opin Ophthalmol 2002; 13: 261–3.

19.

Pallikaris

I.G.

, Kymionis

G.D.

, Panagopoulou

S.I.

Induced optical aberrations following formation of a laser in situ keratomileusis flap. J Cataract Refract Surg 2002; 28: 1737–41.

20.

Porter

, MacRae

, Yoon

Separate effects of the microkeratome incision and laser ablation on the eye's wave aberration. Am J Ophthalmol 2003; 136: 327–37.

21.

Chung

S.H.

, Lee

I.S.

, Lee

Y.G.

Comparison of higher-or-der aberrations after wavefront-guided laser in situ keratomileusis and laser-assisted subepithelial keratectomy. J Cataract Refract Surg 2006; 32: 779–84.

22.

Dai

, Chu

, Zhou

One-year outcomes of epi-LASIK for myopia. J Refract Surg 2006; 22: 589–95.

23.

Muallem

M.S.

, Yoo

S.Y.

, Romano

A.C.

Corneal flap thickness in laser in situ keratomileusis using the Moria M2 microkeratome. J Cataract Refract Surg 2004; 30: 1902–8.

24.

Pietila

, Makinen

, Suominen

Bilateral comparison of corneal flap dimensions with the Moria M2 reusable head and single use head microkeratomes. J Refract Surg 2006; 22: 354–7.

25.

Asilanides

I.M.

, Tsiklis

N.S.

, Astyrakakis

N.I.

LASIK flap characteristics using the Moria M2 microkeratome with the 90-micron single use head. J Refract Surg 2007; 23: 45–9.

26.

Huhtala

, Pietila

, Makinen

Corneal flap thickness with the Moria M2 single-use head 90 microkeratome. Acta Ophthalmol Scand 2007; 85: 401–6.

Comparison of Higher-Order Aberrations after Lasik Using Disposable Microkeratome 130 and 90 Micron Heads

Abstract

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