Long-term Outcomes of Photorefractive Keratectomy for Low to High Myopia: 13 to 19 Years of Follow-Up

Vestergaard, Anders Højslet; Hjortdal, Jesper; Ivarsen, Anders; Work, K.; Grauslund, Jakob; Sjølie, Anne Katrin

doi:10.3928/1081597x-20130415-02

Cited by 39 publications

(29 citation statements)

References 25 publications

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“…Our results and the existing literature indicate that cPRK is more effective than LASEK in reducing initial significant haze [13,25,27]. To our knowledge, no studies have directly compared [18]. Our findings indicate that the improvements in surface ablation with cPRK and LASEK not only reduce short-term, but also medium-term corneal haze.…”

Section: Discussionsupporting

confidence: 56%

“…The umbrella term for many of these improvements is "advanced surface ablation," which includes photorefractive keratectomy with cooling (cPRK) and laser-assisted subepithelial keratectomy (LASEK), among others [17]. Long-term outcomes of standard surface ablation, such as PRK, are well studied, but only short-term follow-ups have been performed for cPRK and LASEK [10,[18][19][20]. Evaluation of both medium and longterm results is of utmost importance to monitor safety and efficacy for all surgical procedures.…”

Section: Introductionmentioning

confidence: 99%

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Four-year to seven-year outcomes of advanced surface ablation with excimer laser for high myopia

Hansen

Lyhne

Grauslund

et al. 2015

Graefes Arch Clin Exp Ophthalmol

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Section: Discussionsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Four-year to seven-year outcomes of advanced surface ablation with excimer laser for high myopia

Hansen

Lyhne

Grauslund

et al. 2015

Graefes Arch Clin Exp Ophthalmol

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“…19 This result can be explained by the effect of the prophylactic use of 0.02% mitomycin C, and the surface smoothing technique, which are known to be effective for the prevention of corneal-haze after PRK in highly-myopic patients. 15,20,21 According to clinical corneal-haze classification of Hanna et al, 13 corneal-haze grade 1.0 is mild, faint reticular haze which can be only seen by broad-tangential illumination, and vision is not affected graded 0 to 1.0.…”

Section: Discussionmentioning

confidence: 99%

Clinical outcomes between optical path difference custom aspheric treatment and optimized prolate ablation photorefractive keratectomy in myopia exceeding 8 diopters

Choi¹,

Park

Lee

2014

Eye

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Purpose Comparison of visual acuity, refractive, and wavefront outcomes associated with optimized prolate ablation (OPA) and optical path difference custom aspheric treatment (OPDCAT) algorithms for correction of myopia exceeding 8 diopters (D). Patients and Methods Patients were randomly assigned to have photorefractive keratectomy (PRK) with OPA (n ¼ 32) or OPDCAT (n ¼ 21) algorithms. Visual acuity, manifest refraction, ocular and corneal higher-order aberrations, corneal asphericity, modulated-transfer function, and pointspread function were compared 1, 3, and 6 months postoperatively. Results Mean manifest-refraction spherical equivalents at 6 months were À 0.24 D in both groups. All patients in both groups had an uncorrected-distance visual acuity of 20/20 or better. Predictability ( ± 1 D from intended refraction) at 6 months was 94% in the OPA group, and in the OPDCAT group it was 86%. The OPA group had less induced corneal and ocular spherical aberrations (SAs) than the OPDCAT group. Postoperative corneal asphericity change was lowest in the OPA group. Both the groups exhibited significantlyimproved AreaRatio-Total value and insignificantly deteriorated AreaRatio-HO value throughout the postoperative period. The OPA group had significantly-higher AreaRatio-Total compared with OPDCAT group at both 1 and 6 months after the operation. Six months after surgery, the Strehl ratio had decreased in both groups, and there was no significant difference between the groups. Conclusion The OPA algorithms yielded higher-objective visual quality and predictability, induced less corneal and ocular SAs, and preserved more preoperativecorneal asphericity than the OPDCAT algorithms.

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“…Second, several factors may influence the precision of the photoablative procedure, including corneal hydration, room humidity, patient age, parallax error, and laser fluency [7,8]. Furthermore, in surface ablation procedures, postoperative wound healing may cause stromal haze formation and affect the long-term stability of the obtained refractive correction, with myopic regression as a well-known complication of high myopic corrections [9].…”

Section: Excimer Laser Keratorefractive Surgerymentioning

confidence: 99%

All-Femtosecond Laser Keratorefractive Surgery

Ivarsen

Hjortdal

2013

Curr Ophthalmol Rep

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During the last few years, refractive lenticule extraction (ReLEx) has been introduced as a new approach in the field of keratorefractive surgery. In contrast to previous treatments, ReLEx is an all-femtosecond laser treatment where a refractive lenticule is created within the intact cornea. The lenticule can be removed using a flapbased approach (ReLEx flex), but in its latest evolution (ReLEx smile), the lenticule is extracted through a small peripheral incision, leaving most of the anterior stroma untouched. In theory, this approach should spare most of the corneal nerves and minimize the biomechanical impact of the procedure. Clinical studies have shown the safety and the visual and refractive outcomes after ReLEx to be as good as after FS-LASIK. The current article aims to provide an up-to-date overview of all-femtosecond laser keratorefractive surgery with particular emphasis on the most current of approach, ReLEx smile.

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Long-term Outcomes of Photorefractive Keratectomy for Low to High Myopia: 13 to 19 Years of Follow-Up

Abstract: PRK for low degrees of myopia seemed safe and effective up to 19 years after surgery with conventional broad beam laser ablation. Refractive predictability was significantly lower and the occurrence of haze was higher in eyes with high myopia.

Cited by 39 publications

References 25 publications

Four-year to seven-year outcomes of advanced surface ablation with excimer laser for high myopia

Four-year to seven-year outcomes of advanced surface ablation with excimer laser for high myopia

Clinical outcomes between optical path difference custom aspheric treatment and optimized prolate ablation photorefractive keratectomy in myopia exceeding 8 diopters

All-Femtosecond Laser Keratorefractive Surgery

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