Excimer laser 6th generation: state of the art and refractive surgical outcomes

Bahrawy, Mohamed El; Alió, Jorge L.

doi:10.1186/s40662-015-0015-5

Cited by 25 publications

(19 citation statements)

References 38 publications

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“…In all cases, a flap diameter of 9.12 mm with a depth of 110 mm was planned. LASIK was done using the sixth-generation Amaris excimer laser (Schwind eye-tech-solutions GmbH and Co., Kleinostheim, Germany) [ 19 ]. This system has a fast repetition rate (500 Hz) and incorporates two levels of fluence.…”

Section: Methodsmentioning

confidence: 99%

Corneal Stability following Hyperopic LASIK with Advanced Laser Ablation Profiles Analyzed by a Light Propagation Study

Gharaibeh

Villanueva

Mas

et al. 2018

Journal of Ophthalmology

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Purpose To assess anterior corneal surface stability 12 months following hyperopic LASIK correction with a light propagation algorithm. Setting Vissum Instituto Oftalmológico de Alicante, Universidad Miguel Hernández, Alicante, Spain. Methods This retrospective consecutive observational study includes 37 eyes of 37 patients treated with 6th-generation excimer laser platform (Schwind Amaris). Hyperopic LASIK was performed in all of them by the same surgeon (JLA) and completed 12-month follow-up. Corneal topography was analyzed with a light propagation algorithm, to assess the stability of the corneal outcomes along one year of follow-up. Results Between three and twelve months postoperatively, an objective corneal power (OCP) regression of 0.39 D and 0.41 D was found for 6 mm and 9 mm central corneal zone, respectively. Subjective outcomes at the end of the follow-up period were as follows: 65% of eyes had spherical equivalent within ±0.50 D. 70% of eyes had an uncorrected distance visual acuity 20/20 or better. 86% of eyes had the same or better corrected distance visual acuity. In terms of stability, 0.14 D of regression was found. No statistically significant differences were found for all the study parameters evaluated at different postoperative moments over the 12-month period. Conclusions Light propagation analysis confirms corneal surface stability following modern hyperopic LASIK with a 6th-generation excimer laser technology over a 12-month period.

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Section: Methodsmentioning

confidence: 99%

Corneal Stability following Hyperopic LASIK with Advanced Laser Ablation Profiles Analyzed by a Light Propagation Study

Gharaibeh

Villanueva

Mas

et al. 2018

Journal of Ophthalmology

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“…The excimer laser has been developed to the sixth-generation lasers, targeting the goal of minimally invasive laser refractive surgery during the past 30 years. The latest laser system delivers more laser spots per second so as to reduce the treatment time [5]. Tran-PRK has brought a new revolution to excimer laser techniques for its bladeless surgery process [6] and superiority in efficiency and safety.…”

Section: Transepithelial Photorefractive Keratectomy (Trans-prk)mentioning

confidence: 99%

Excimer Laser and Femtosecond Laser in Ophthalmology

Hu¹,

Huang²,

Lin³

2016

High Energy and Short Pulse Lasers

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Laser technology is used in many basic and clinical disciplines and specialties, and it has played an important role in promoting the development of ophthalmology, especially corneal refractive surgery. We provide an overview of the evolution of laser technology for use in refractive and other ophthalmologic surgeries, mainly focusing on two types of lasers and their applications. First, we discuss the characteristics of the excimer laser and its application in corneal refractive surgery treating ametropia e.g., photorefractive keratectomy PRK , laser epithelial keratomileusis L"SEK , epipolis laser in situ keratomileusis Epi-L"SIK , and transepithelial photorefractive keratectomy Trans-PRK and presbyopia surgery . Second, we discuss the characteristics of the femtosecond laser and its application in corneal refractive surgery e.g., femtosecond laser in situ keratomileusis FS-L"SIK , insertion of intracorneal ring segments, smallincision lenticule extraction SMILE , and femtosecond lenticule extraction FLEx and other ophthalmologic surgeries e.g., penetrating keratoplasty PKP , deep anterior lamellar keratoplasty, Descemet's stripping endothelial keratoplasty DSEK , and cataract surgery . The patients studied received many benefits from the excimer laser and femtosecond laser technologies and were satisfied with their clinical outcomes.

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“…to compensate for pupillary cyclotorsion and pupillary centroid shifts and wavefront-guided technology for customised ablation will result in significantly reducing the incidence of complications in children. 73 Concerns over endothelial cell loss following AC-pIOL implantation and cataract formation after the PC-pIOL implantation can be credibly reduced through meticulous pre-operative screening measures. size in the pre-operative stage and to achieve the optimal appropriate vault size after ICL implantation surgery.…”

Section: Instrastromal Ring Implantation For Keratoconusmentioning

confidence: 99%

“…As such, the centre of the ablation zone will match the centre of the visual axis and pupillary centre/margin under general anaesthesia, thus negating the need for self-fixation and averting a possible off-centred laser ablation in conjunction with wavefront treatment profile (wavefront guided or optimised). 73 Recent literature has also provided the required evidence in expanded applicability of corneal laser surgery for treatment of paediatric accommodative esotropia in children who are unable or unwilling to comply with spectacle correction and when strabismus is stable.…”

Section: Instrastromal Ring Implantation For Keratoconusmentioning

confidence: 99%

Update on Paediatric Refractive Surgery

Pirouzian¹,

Hashemian²,

Khodaparast³

2015

European Ophthalmic Review

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Purpose: To provide a summary of the most recent evidence-based data on the paediatric refractive surgery. Methods: A review of the published studies from 1990 to 2015 was undertaken with emphasis on recent articles from 2010 to 2015. Results: Searching Scopus and PubMed, using the keywords of refractive surgery, phakic, paediatric, IOL, children and amblyopia alone or in various combinations yielded a total of about 48 articles on this topic from 1990 to 2015. Excluding review articles, fewer than 35 articles were included. Original research articles were only in the form of case reports/series on corneal laser surgery and phakic intraocular lens implantation or clear lens extraction. A total of fewer than 800 patients and 700 eyes had undergone a form of refractive surgery listed above. No randomised clinical trial (RCT) study was available on the topic. Age varied from 7 months to 17 years for non-corneal cross-linking studies. Most commonly performed operations were corneal laser ablative procedures (photorefractive keratectomy [PRK], laser-assisted sub-epithelial keratectomy[LASEK], laser-assisted in situ keratomileusis [LASIK]), phakic intraocular lens implantations (p-IOL, anterior or posterior chamber) and clear lens extraction. The indications for surgical intervention were for refractive -high amplitude iso-ametropic or anisometropic -amblyopia in the setting of the previously failed medical interventions and spectacle intolerance or non-compliance (physical or neurobehavioral in nature) and high accommodative esotropia with/without amblyopia. The main objective of the studies was to assess for visual acuity gained or lost following surgery and for correction of strabismus, i.e. achieving orthophoria. Further search on the keywords 'cross-linking, cornea, rings and children' from the same databases resulted in 130 articles. No RCT study was available on the topic. Age varied from 7 months to 17 years for non-corneal cross-linking studies. The focus of the most recent refractive surgery articles has been on the treatment and stabilisation of irregular myopic astigmatism from kerato-ectatic conditions by means of corneal cross-linking and intrastromal ring/in-lay implantation. Discussion: Refractive surgery remains a controversial topic in paediatric age population. However, the evidence clearly supports refractive surgery for treatment of children with refractive amblyopia and for treatment of accommodative esotropia in children unable or unwilling to wear spectacles or contact lenses. Conclusion: Consensus exists among published authors that refractive surgery may be considered in children with refractive amblyopia after exhausting various therapeutic medical options for amblyopia. Published authors have universally endorsed undertaking prospective multi-centred RCTs to conclusively establish the long-term safety and efficacy of various types of refractive surgery in the paediatric patients of different age groups. KeywordsChildren, myopia, refractive surgery, laser, intraocular lens, anisometr...

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Excimer laser 6th generation: state of the art and refractive surgical outcomes

Cited by 25 publications

References 38 publications

Corneal Stability following Hyperopic LASIK with Advanced Laser Ablation Profiles Analyzed by a Light Propagation Study

Corneal Stability following Hyperopic LASIK with Advanced Laser Ablation Profiles Analyzed by a Light Propagation Study

Excimer Laser and Femtosecond Laser in Ophthalmology

Update on Paediatric Refractive Surgery

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