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femtosecond cornea

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https://www.readbyqxmd.com/read/29785082/control-matched-comparison-of-refractive-and-visual-outcomes-between-small-incision-lenticule-extraction-and-femtosecond-laser-assisted-lasik
#1
Takahiro Kataoka, Tomoya Nishida, Azusa Murata, Mayuka Ito, Naoki Isogai, Rie Horai, Takashi Kojima, Yoko Yoshida, Tomoaki Nakamura
Purpose: This retrospective case-matched study aimed to compare visual and refractive outcomes between small incision lenticule extraction (SMILE) and LASIK. Patients and methods: Patients who underwent SMILE (34 eyes of 23 patients) or LASIK (34 eyes of 24 patients) were enrolled and matched according to preoperative manifest refractive spherical equivalents. The mean preoperative manifest refractive spherical equivalent was -4.69±0.6 and -4.67±0.64 D in the SMILE and LASIK groups, respectively...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29781929/femtosecond-laser-assisted-graft-preparation-for-descemet-membrane-endothelial-keratoplasty
#2
Hamish D McKee, Vishal Jhanji
PURPOSE: To describe a technique of using a femtosecond laser to assist with graft preparation for Descemet membrane endothelial keratoplasty (DMEK). METHODS: A femtosecond laser was used to assist in graft preparation for 3 DMEK procedures. The donor cornea is mounted on a proprietary artificial anterior chamber. A partial thickness deep circular cut is made with the femtosecond laser through the endothelium, Descemet membrane, and posterior stroma. Graft preparation is then completed without the use of a corneal trephine...
May 16, 2018: Cornea
https://www.readbyqxmd.com/read/29771882/-morphological-changes-of-cornea-in-children-with-hyperopia-in-the-immediate-and-remote-postoperative-period-after-laser-keratomieleusis-according-to-confocal-microscopy-data
#3
I L Kulikova, N P Pashtaev, O V Shlenskaya
Studying morphological changes of cornea in the remote postoperative period is becoming increasingly relevant with refractive surgeries being adapted for children. PURPOSE: comparative analysis of keratocyte density and hystomorphologic changes of cornea after laser in situ keratomieleusis (LASIK) and femtosecond laser-assisted LASIK (FS-LASIK) in children with hyperopia. MATERIAL AND METHODS: 109 patients aged 6-17 years in 2 groups were examined with 'Confoscan-4' confocal microscope...
2018: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29757850/corneal-irregular-astigmatism-and-curvature-changes-after-small-incision-lenticule-extraction-three-year-follow-up
#4
Haris Sideroudi, Apostolos Lazaridis, Anke Messerschmidt-Roth, Georgios Labiris, Vassilios Kozobolis, Walter Sekundo
PURPOSE: To evaluate the long-term changes in anterior and posterior corneal irregular astigmatism and curvatures after small incision lenticule extraction (SMILE). METHODS: Fifty eyes of 28 patients underwent SMILE for myopic astigmatism. All procedures were performed using the VisuMax® femtosecond laser. A Scheimpflug camera was used for preoperative and 3-year postoperative tomography. Anterior and posterior corneal Fourier parameters (spherical component, regular astigmatism, asymmetry, and irregularity) and curvature data were evaluated and compared within 2 subgroups according to the magnitude of the refractive correction (low myopia group: spherical equivalent (SEQ) ≥ -6 D; high myopia group: (SEQ) < -6 D)...
April 27, 2018: Cornea
https://www.readbyqxmd.com/read/29738584/corneal-allogenic-intrastromal-ring-segments-cairs-combined-with-corneal-cross-linking-for-keratoconus
#5
Soosan Jacob, Shaila R Patel, Amar Agarwal, Arvind Ramalingam, A I Saijimol, John Michael Raj
PURPOSE: To describe a new technique for the treatment of keratoconus using corneal allogenic intrastromal ring segments (CAIRS). METHODS: CAIRS trephined from donor cornea using a double-bladed trephine were implanted into mid-depth femtosecond laser-dissected channels in the cornea of patients with keratoconus in the 6.5-mm optic zone, followed by accelerated corneal cross-linking (A-CXL)-either conventional or contact lens-assisted CXL (A-CACXL), depending on minimum corneal thickness...
May 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29718869/changes-of-corneal-high-order-aberrations-after-femtosecond-laser-assisted-in-situ-keratomileusis
#6
Jing Wang, Yanlin Ren, Kun Liang, Zhengxuan Jiang, Liming Tao
BACKGROUND: Femtosecond laser-assisted in situ keratomileusis (FS-LASIK) has gained widespread popularity as a safe, effective and predictable treatment for correcting myopia and myopic astigmatism.However, complications such as biomechanical changes, structural weakness, dry eye and induction of high-order aberrations (HOAs) have been associated with FS laser excision. The induction of HOAs has been reported to reduce quality of vision, leading to increased glare, halos, starburst and deterioration of contrast function corneal HOAs play a significant role in whole-eye aberration...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29708931/recent-advances-in-wavefront-guided-lasik
#7
Edward Manche, Joshua Roe
PURPOSE OF REVIEW: Laser vision correction remains an active area of research, and there have been many recent advances in the field. The purpose of this review is to provide an update on the recent advances for one of the most common methods of laser vision correction, wavefront-guided laser in-situ keratomileusis (LASIK). RECENT FINDINGS: Recent technological advancements in wavefront aberrometry are largely responsible for the improved visual outcomes that have been recently reported...
April 27, 2018: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/29681179/-femtosecond-laser-assisted-keratoplasty
#8
László Módis, Eszter Szalai, Zsuzsanna Flaskó, Bence Kolozsvári, András Berta
INTRODUCTION AND AIM: To present our results on femtosecond laser-assisted penetrating keratoplasty. PATIENTS AND METHOD: Twenty-five eyes of 25 patients underwent surgery with the following indications: pseudophakic bullous keratopathy (n = 10), keratoconus (n = 4), corneal dystrophy (n = 5), corneal scar (n = 4), band keratopathy (n = 2). Trephination of both the donor and recipient corneas were performed with VisuMax femtosecond laser device (Carl Zeiss Meditec AG, Jena, Germany)...
April 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29658366/a-novel-case-using-femtosecond-laser-acquired-lenticule-for-recurrent-pterygium-case-report-and-literature-review
#9
Om Prakash Pant, Ji-Long Hao, Dan-Dan Zhou, Fan Wang, Cheng-Wei Lu
Small incision lenticule extraction (SMILE) is a minimally invasive, safe and flapless femtosecond laser technique used mainly to correct myopia through extraction of a corneal lenticule. Lenticules obtained in this way are transparent and of high quality, and thus, can be used to treat other corneal diseases. A 65-year-old male patient presented with recurrent pterygium complicated by thin cornea. The patient was treated surgically using a SMILE-extracted lenticule to avoid further complications and to maintain eyeball integrity...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29643779/the-safety-and-effectiveness-of-a-novel-annular-keratopigmentation-method-a-case-report
#10
Francis Ferrari, Robbert van Haselen
Background: We investigated the safety and effectiveness of a novel aesthetic femtosecond-assisted annular keratopigmentation technique. Case Report: A 21-year-old female patient in good general and ophthalmological health with the wish to change the colour of her eyes was treated with a femtosecond-assisted annular keratopigmentation technique. Pigment was inserted in a channel in the cornea (external diameter 9.3 mm; internal diameter 5.5 mm) created with a femtosecond laser at a depth of 225 μm...
January 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29587979/keratophakia-with-autograft-aided-by-a-femtosecond-laser-one-year-follow-up
#11
Claudio Orlich
Autologous tissue from correction of myopia with small-incision lenticule extraction in 1 eye of a patient was used to enhance corneal curvature in the contralateral eye, in which a corneal ulcer had flattened the cornea. Regularization of the corneal tomography was achieved, improving the visual quality and visual capacity of the patient.
February 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29587975/astigmatic-correction-by-intrastromal-astigmatic-keratotomy-during-femtosecond-laser-assisted-cataract-surgery-factors-in-outcomes
#12
Yong-Soo Byun, Seonjoo Kim, Marjorie Z Lazo, Mi-Hyun Choi, Min-Ji Kang, Jee-Hye Lee, Young-Sik Yoo, Woong-Joo Whang, Choun-Ki Joo
PURPOSE: To evaluate the 6-month outcomes of femtosecond laser astigmatic keratotomy (AK) combined with femtosecond laser-assisted cataract surgery and identify factors affecting the efficacy of astigmatic correction. SETTING: Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, South Korea. DESIGN: Retrospective case series. METHODS: Femtosecond laser AK was performed during femtosecond laser-assisted cataract surgery...
February 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29575612/assessment-of-the-metabolism-and-morphology-of-the-porcine-cornea-lens-and-retina-by-two-photon-imaging
#13
Ana Batista, Hans Georg Breunig, Aisada König, António Miguel Morgado, Karsten König
Two-photon imaging is a non-invasive imaging technique with increasing importance in the biological and medical fields since it allows intratissue cell imaging with high resolution. We demonstrate the feasibility of using a single two-photon instrument to evaluate the cornea, the crystalline lens, and the retina based on their autofluorescence. Image acquisition was performed using a custom-built two-photon microscope for 5D microscopy with a near infrared broadband sub-15 femtosecond laser centered at 800 nm...
March 25, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29564359/femtosecond-laser-assisted-astigmatic-keratotomy-a-review
#14
REVIEW
John S M Chang
Background: Astigmatic keratotomy (AK) remains an accessible means to correct surgically induced or naturally occurring astigmatism. The advantages of femtosecond laser-assisted astigmatic keratotomy (FSAK) over conventional methods have been recognized recently. Main text: This review evaluates the efficacy, complications, and different methods of FSAK for correction of astigmatism in native eyes and those that underwent previous penetrating keratoplasty (PKP)...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29543194/-strength-properties-of-rabbit-cornea-after-femtosecond-laser-keratoplasty-with-and-without-different-intracorneal-implants
#15
N P Pashtaev, N A Pozdeeva, V V Zotov, M V Sinitsyn, M A Shcheglova
AIM: to conduct a comparative experimental study of the effect of the use of intracorneal implants during femtosecond laser-assisted intrastromal pocket (IP) and intrastromal tunnel (IT) formation on the strength properties of the cornea. MATERIAL AND METHODS: The experimental study was performed on 24 corneas of 12 rabbit eyes enucleated 1 month after slaughtering. All eyes were divided into 6 groups according to the method of operation. IP and IT were created with IntraLase FS 60 kHz femtolaser...
2018: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29537886/corneal-densitometry-after-femtosecond-laser-assisted-in-situ-keratomileusis-fs-lasik-and-small-incision-lenticule-extraction-smile
#16
Mehdi Shajari, Emanuel Wanner, Vladimir Rusev, Shervin Mir Mohi Sefat, Wolfgang J Mayer, Thomas Kohnen, Siegfried Priglinger, Daniel Kook
PURPOSE: To compare corneal densitometry values after Femtosecond Laser-Assisted In Situ Keratomileusis (Fs-LASIK) and Small Incision Lenticule Extraction (SMILE) using Scheimpflug Imaging. METHODS: Our retrospective clinical trial included a total of 146 eyes where 57 eyes underwent Fs-LASIK and 89 eyes underwent SMILE. Examinations with a Pentacam Scheimpflug device (Oculus, Wetzlar, Germany) were performed before surgery, 1 week, 1 month, 3 months, 6 months, and 1 year after surgery...
May 2018: Current Eye Research
https://www.readbyqxmd.com/read/29500874/high-resolution-label-free-two-photon-imaging-of-diseased-human-corneas
#17
Ana Batista, Hans Georg Breunig, Aisada König, Andreas Schindele, Tobias Hager, Berthold Seitz, Karsten König
The diagnosis of corneal diseases may be improved by monitoring the metabolism of cells and the structural organization of the stroma using two-photon imaging (TPI). We used TPI to assess the differences between nonpathological (NP) human corneas and corneas diagnosed with either keratoconus, Acanthamoeba keratitis, or stromal corneal scars. Images were acquired using a custom-built five-dimensional laser-scanning microscope with a broadband sub-15 femtosecond near-infrared pulsed excitation laser and a 16-channel photomultiplier tube detector in combination with a time-correlated single photon counting module...
March 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29416380/keratoconus-treatment-using-femtosecond-assisted-intrastromal-corneal-graft-faiscg-surgery-a-case-series
#18
Khosrow Jadidi, Seyed Aliasghar Mosavi
We describe an intrastromal corneal graft technique that uses femtosecond laser to create a desirable corneal lenticule with precise diameter, depth, and shape as well as an intra-stromal pocket in keratoconus patients. The technique seems to be a feasible and safe treatment option to treat keratoconic eyes with reference to the irregularity and instability of cornea. The technique can be performed easily and appears safe and effective. At 7 days postoperatively, all eyes were white and quiet, and the grafts were clear...
2018: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/29416315/comparison-of-corneal-biomechanics-after-myopic-small-incision-lenticule-extraction-compared-to-lasik-an-ex-vivo-study
#19
Anastasios John Kanellopoulos
Purpose: To investigate ex vivo potentially different corneal biomechanical properties after small-incision lenticule extraction (SMILE) versus LASIK for myopic correction. Methods: Thirty human donor corneas were subjected to either myopic SMILE or femtosecond laser-assisted LASIK. Donor corneas were assigned to six investigative groups: Group A, -3.00 D (diopters) SMILE; Group B, -8.00 D SMILE; Group C, -3.00 D LASIK; and Group D, -8.00 D LASIK. Additionally, two control groups were formed: Group E, SMILE and Group F, LASIK...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29408829/femtosecond-laser-assisted-small-incision-endokeratophakia-using-a-xenogeneic-lenticule-in-rhesus-monkeys
#20
Miao He, He Jin, Hong He, Hui Ding, Wei Wang, Liangping Liu, Chi Zhang, Xingwu Zhong
PURPOSE: To evaluate the feasibility and safety of xenogeneic endokeratophakia in rhesus monkeys and to explore the effects of a concave lenticule on refractive power. METHODS: Three adult New Zealand white rabbits and 6 healthy rhesus monkeys were used. The xenogenic concave grafts were created from the rabbits using a modified small incision lenticule extraction technique; after being cryopreserved in glycerol for 1 week, the grafts were implanted into the monkey recipient corneas...
March 2018: Cornea
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