Ocular aberrations after wavefront optimized LASIK for myopia

Padmanabhan, Prema; Basuthkar, Subam S.; Joseph, Roy
June 2010
Indian Journal of Ophthalmology;Jun2010, Vol. 58 Issue 4, p307
Academic Journal
Purpose: To study the change in ocular aberrations after wavefront optimized (WFO) laser in situ keratomileusis (LASIK) for correction of myopia and to analyze causative factors that may influence them. Materials and Methods: This was a prospective case series. WFO LASIK was performed for the correction of myopia, using the hansatome (Bausch and Lomb) microkeratome to create the flap and the Allegretto laser (Wavelight Technologie) to perform the ablation. The Allegretto wave analyser (Tscherning-type) measured the ocular aberrations prior to LASIK, one month and six months postoperatively. Results: The mean age of the 59 patients included in the study was 25±5.64 years and the mean spherical equivalent of the 117 eyes that underwent LASIK was -5.33±1.22 preoperatively and -0.21±0.38 postoperatively. Hundred and two eyes of 117 (87%) achieved uncorrected visual acuity (UCVA) of 20/20 or better after WFO LASIK and 104 of 117 eyes (89%) were within ±0.5D of the attempted refractive correction. There was a 1.96-fold increase in total root-mean-square of higher order aberrations. Induced changes in seven of the 22 higher order Zernike terms showed a significant linear correlation with the refractive correction attempted. Larger ablation zones induced less spherical aberration. Conclusion: In spite of an excellent visual outcome, WFO LASIK induces significant higher order aberrations. Large ablation zones reduce the induction of spherical aberration.


Related Articles

  • One-year Outcomes of a Bilateral Randomized Prospective Clinical Trial Comparing Laser Subepithelial Keratomileusis and Photorefractive Keratectomy. Pirouzian, Amir; Thornton, Jennifer; Ngo, Sieu // Journal of Refractive Surgery;Jun2006, Vol. 22 Issue 6, p575 

    PURPOSE: To compare laser subepithelial keratomileusis (LASEK) and photorefractive keratectomy (PRK) in different eyes of the same patients in terms of visual acuity, refractive error, and complications over 1 year. METHODS: This prospective, randomized, double-masked study comprised 30...

  • NeuroVision Treatment for Low Myopia Following LASIK Regression. Kooi Ling Lim; Han Bor Fam // Journal of Refractive Surgery;Apr2006, Vol. 22 Issue 4, p406 

    PURPOSE: To evaluate a novel non-surgical method for improving vision in a refractive surgery patient. METHODS: A 45-year-old man who had undergone LASIK 5 years previously presented with blurred distance vision. Unaided vision in the right eye was 20/32-2 and 20/20 in the left eye. He enrolled...

  • LASIK treats low-level hyperopia safely, effectively. Charters, Lynda // Ophthalmology Times;09/15/99, Vol. 24 Issue 18, p21 

    Compares the effectiveness of the two lasers used to treat hyperopia with LASIK. Details on the annular ablation; Discussion on the uncorrected visual acuity levels; Information on the patient satisfaction on the rapid visual rehabilitation.

  • Topography-guided Treatment of Irregular Astigmatism With the WaveLight Excimer Laser. Jankov II, Mirko R.; Panagopoulou, Sophia I.; Tsiklis, Nikolaos S.; Hajitanasis, Georgos C.; Aslanides, Loannis M.; Pallikaris, Ioannis G. // Journal of Refractive Surgery;Apr2006, Vol. 22 Issue 4, p335 

    PURPOSE: To evaluate the feasibility, safety, and predictability of correcting high irregular astigmatism in symptomatic eyes with the use of topography-guided photoablation. METHODS: In a prospective, non-comparative case series, 16 consecutive symptomatic eyes of 11 patients with small...

  • LASIK results good, stable for myopic astigmatism. Charters, Lynda // Ophthalmology Times;09/15/99, Vol. 24 Issue 18, p19 

    Reports the use of LASIK with VISX Star excimer laser in the treatment of myopia with and without astigmatism. Discussion on the refractive errors and visual acuity; Details on the possible complications; Usefulness of the bandage lens in the prevention of complications.

  • Patients with low myopia achieve good LASIK results. Scerra, Chet // Ophthalmology Times;10/15/2002, Vol. 27 Issue 20, p48 

    Examines the LASIK results on patients with low myopia using the Technolas 217A laser optical zones in the U.S. Range of myopia in patients treated with a non-wavefront-driven laser; Percentage of patients with 20/12 achieved visions after the treatment; Statistics of patients with low...

  • Photopic pupillometry-guided presby-LASIK offers patients more customized approach. Hasson, Matt // Ocular Surgery News;6/25/2008, Vol. 26 Issue 12, p26 

    The article reports on the customized approach of photopic pupillometry-guided presby-laser-assisted in situ keratomileusis (LASIK) in improving near visual acuity while preserving distance acuity. It also offers better refractive outcomes compared to conductive keratoplasty (CK) and...

  • The efficacy and safety of posterior pole buckles in the control of progressive high myopia. Ward, B.; Tarutta, E. P.; Mayer, M. J. // Eye;Dec2009, Vol. 23 Issue 12, p2169 

    PurposeDegenerative myopia is a significant cause of vision loss; yet there is no accepted way of controlling its causative phenotype—progressive high axial myopia. Scleral reinforcement, introduced over 50 years ago, was discredited as a useful technique. This 5-year ‘proof of...

  • Laser procedure for nearsightedness.  // FDA Consumer;Jan/Feb96, Vol. 30 Issue 1, p2 

    Reports that the United States Food and Drug Administration has approved an ophthalmic laser system that improves nearsightedness. Workings of SVS Apex Excimer Laser System; How eye surgery is performed using the laser; Purpose of photorefractive keratectomy (PRK).


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics