Femtosecond Lasers in Ophthalmology

2014 ◽  
Vol 08 (01) ◽  
pp. 37
Author(s):  
Duna A Raoof ◽  
Roni M Shtein ◽  
◽  
Keyword(s):  
Femtosecond Laser ◽  
Femtosecond Lasers ◽  
Corneal Transplantation ◽  
Laser Pulses ◽  
Full Thickness ◽  
Ophthalmic Surgery ◽  
Laser Technology ◽  
Ideal Tool ◽  
Flap Creation

The use of the femtosecond laser in ophthalmic surgery over the last decade has resulted in the development of innovative procedures. The ultra-short infrared laser pulses of the femtosecond laser can be applied precisely and predictably with minimal collateral tissue damage, making it an ideal tool for highly precise ophthalmic surgery. Flap creation in laserin situkeratomileusis (LASIK) is the most common use of this laser. It can also be used for other corneal refractive procedures, lamellar and full-thickness corneal transplantation and cataract surgery. This article summarises recent advanced applying femtosecond laser technology in ophthalmology.

scholarly journals Femtosecond Lasers in Ophthalmology

2013 ◽  
Vol 06 (01) ◽  
pp. 38 ◽  
Author(s):  
Duna Raoof-Daneshvar ◽  
Roni M Shtein ◽  
◽  
Keyword(s):  
Femtosecond Laser ◽  
Femtosecond Lasers ◽  
Corneal Transplantation ◽  
Laser Pulses ◽  
Full Thickness ◽  
Ophthalmic Surgery ◽  
Laser Technology ◽  
Ideal Tool ◽  
Flap Creation

The use of the femtosecond laser in ophthalmic surgery over the last decade has resulted in the development of innovative procedures. The ultra-short infrared laser pulses of the femtosecond laser can be applied precisely and predictably with minimal collateral tissue damage, making it an ideal tool for highly precise ophthalmic surgery. Flap creation in laserin situkeratomileusis (LASIK) is the most common use of this laser. It can also be used for other corneal refractive procedures, lamellar and full-thickness corneal transplantation, and cataract surgery. This article summarizes recent advanced applying femtosecond laser technology in ophthalmology.

New Applications of Femtosecond Lasers

2010 ◽  
Vol 04 (01) ◽  
pp. 48 ◽  
Author(s):  
Volkan Hurmeric ◽  
Mohamed Abou Shousha ◽  
Sonia H Yoo ◽  
◽  
◽  
...  
Keyword(s):  
Surgical Outcomes ◽  
Femtosecond Lasers ◽  
Ophthalmic Surgery ◽  
Surgical Options ◽  
Lenticule Extraction ◽  
New Applications ◽  
Extraction Treatment ◽  
Flap Creation

Femtosecond laser (FL) platforms are gaining popularity in the refractive and ophthalmic surgery market owing to the quality of the surgical outcomes, predictability and safety. The latest generation of FL offers faster surgery and better surgical outcomes. Today, FL can be used for laserin situkeratomileusis (LASIK) flap creation, Intacs implantation, lamellar and penetrating keratoplasty and astigmatic keratectomy. Recent refinements and developments in FL technology have introduced even newer surgical options, and the most recent applications of FL include refractive corrections with stromal lenticule extraction, treatment of presbyopia and cataract surgery.

scholarly journals Flap Thickness and the Risk of Complications in Mechanical Microkeratome and Femtosecond Laser in Situ Keratomileusis: A Literature Review and Statistical Analysis

Diagnostics ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1588
Author(s):  
Piotr Kanclerz ◽  
Ramin Khoramnia
Keyword(s):  
Femtosecond Laser ◽  
Web Of Science ◽  
Femtosecond Lasers ◽  
Cochrane Review ◽  
Light Sensitivity ◽  
Laser In Situ Keratomileusis ◽  
Extensive Search ◽  
Flap Thickness ◽  
Flap Creation

Introduction: A recent Cochrane review found no difference in visual acuity outcomes between femtosecond-assisted laser in situ keratomileusis (LASIK) and LASIK using mechanical microkeratomes (MMKs). This study compares the flap thickness and risk of complications related to flap creation using femtosecond lasers and MMKs. Methods: PubMed and the Web of Science are used to search the medical literature. An extensive search is performed to identify the flap thickness and complications of LASIK as reported up to Jul 15, 2021. The following keywords are used in various combinations: Corneal flap, femtosecond laser, laser in situ keratomileusis, laser-assisted in situ keratomileusis, LASIK, mechanical microkeratome. Results: After removing duplicates and irrelevant studies, 122 articles were included for review. Pooled differences for intended vs. postoperative flap thickness using MMKs and femtosecond laser were −4.07 μm (95% CI: −19.55, 3.24 μm) in studies on the MMK and 5.43 μm (95% CI: 2.30, 7.84 μm; p < 0.001), respectively. After removing the studies evaluating outcomes of the old generation Hansatome MMKs (which had a significantly greater variation of flap thickness), the pooled difference for newer MMKs was 4.97 μm (95% CI: 0.35, 9.58 μm; p < 0.001), but the results still favored the femtosecond laser. Uncommon and mild complications unique for the femtosecond LASIK are epithelial gas breakthrough, opaque bubble layer, transient light sensitivity syndrome, and rainbow glare. A single study reported a very low, but stastically different risk of postoperative flap slippage (0.033% for MMK LASIK, and 0.003% for femtosecond LASIK, respectively). Conclusion: In both manual microkeratome and femtosecond LASIK, intra- and postoperative complications were uncommon. The evidence of the superiority of one technique in terms of complications over another cannot be indisputably stated.

Dry eyes and corneal sensation after laser in situ keratomileusis with femtosecond laser flap creation

2009 ◽  
Vol 35 (12) ◽  
pp. 2092-2098 ◽  
Author(s):  
Shahzad I. Mian ◽  
Amy Y. Li ◽  
Satavisha Dutta ◽  
David C. Musch ◽  
Roni M. Shtein
Keyword(s):  
Femtosecond Laser ◽  
Laser In Situ Keratomileusis ◽  
Dry Eyes ◽  
Corneal Sensation ◽  
Flap Creation

In situ observation of photoinduced refractive-index changes in filaments formed in glasses by femtosecond laser pulses

2001 ◽  
Vol 26 (1) ◽  
pp. 19 ◽  
Author(s):  
Kazuhiro Yamada ◽  
Wataru Watanabe ◽  
Tadamasa Toma ◽  
Kazuyoshi Itoh ◽  
Junji Nishii
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
In Situ Observation ◽  
Index Changes

scholarly journals Incidence and Outcomes of Anterior Chamber Gas Bubble during Femtosecond Flap Creation for Laser-Assisted In Situ Keratomileusis

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Sloan W. Rush ◽  
Philip Cofoid ◽  
Ryan B. Rush
Keyword(s):  
Femtosecond Laser ◽  
Anterior Chamber ◽  
Bubble Formation ◽  
Visual Outcome ◽  
Gas Bubble ◽  
Gas Formation ◽  
Uncorrected Visual Acuity ◽  
Chamber Gas ◽  
Flap Creation

Purpose. To report the incidence and outcomes of anterior chamber gas bubble formation during femtosecond laser flap creation for laser-assisted in situ keratomileusis (LASIK).Methods. The charts of 2,886 consecutive eyes that underwent femtosecond LASIK from May 2011 through August 2014 were retrospectively reviewed. The incidence, preoperative characteristics, intraoperative details, and postoperative outcomes were analyzed in subjects developing anterior chamber gas bubble formation during the procedure.Results. A total of 4 cases (0.14%) developed anterior chamber gas bubble formation during femtosecond laser flap creation. In all four cases, the excimer laser was unable to successfully track the pupil immediately following the anterior chamber bubble formation, temporarily postponing the completion of the procedure. There was an ethnicity predilection of anterior chamber gas formation toward Asians (p=0.0055). An uncorrected visual acuity of 20/20 was ultimately achieved in all four cases without further complications.Conclusions. Anterior chamber gas bubble formation during femtosecond laser flap creation for LASIK is an uncommon event that typically results in a delay in treatment completion; nevertheless, it does influence final positive visual outcome.

scholarly journals Rescue of Primary Incomplete Microkeratome Flap with Secondary Femtosecond Laser Flap in LASIK

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
E. A. Razgulyaeva
Keyword(s):  
Case Report ◽  
Femtosecond Laser ◽  
Imaging Technique ◽  
Corneal Tissue ◽  
Ablation Procedure ◽  
Advanced Imaging ◽  
Laser Technology ◽  
The Creation ◽  
Excellent Tool

For laser-assisted in situ keratomileusis (LASIK) retreatments with a previous unsuccessful mechanical microkeratome-assisted surgery, some surgical protocols have been described as feasible, such as relifting of the flap or the creation of a new flap and even the change to a surface ablation procedure (photorefractive keratectomy (PRK)). This case shows the use of femtosecond technology for the creation of a secondary flap to perform LASIK in a cornea with a primary incomplete flap obtained with a mechanical microkeratome. As we were unable to characterize the interface of the first partial lamellar cut, a thick flap was planned and created using a femtosecond laser platform. As the primary cut was very thick in the nasal quadrant, a piece of loose corneal tissue appeared during flap lifting which was fitted in its position and not removed. Despite this condition and considering the regularity of the new femtosecond laser cut, the treatment was uneventful. This case report shows the relevance of a detailed corneal analysis with an advanced imaging technique before performing a secondary flap in a cornea with a primary incomplete flap. The femtosecond laser technology seems to be an excellent tool to manage such cases successfully.

scholarly journals The method of intracellular fluorescent species in situ production within living cells by femtosecond laser pulses

2019 ◽  
Vol 1410 ◽  
pp. 012063
Author(s):  
A A Osychenko ◽  
A D Zalessky ◽  
A M Shakhov ◽  
A A Astafiev ◽  
M S Syrchina ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Living Cells ◽  
Femtosecond Laser Pulses ◽  
In Situ Production
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