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Journal of Refractive Surgery

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https://www.readbyqxmd.com/read/29117422/erratum-for-mathematical-model-to-compare-the-relative-tensile-strength-of-the-cornea-after-prk-lasik-and-small-incision-lenticule-extraction
#1
(no author information available yet)
No abstract text is available yet for this article.
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117421/erratum-for-intracorneal-ring-segments-implantation-for-corneal-ectasia
#2
(no author information available yet)
No abstract text is available yet for this article.
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117420/intraoperative-optical-coherence-tomography-guided-management-of-cap-lenticule-adhesion-during-smile
#3
Jayanand Urkude, Jeewan S Titiyal, Namrata Sharma
PURPOSE: To report successful lenticule extraction using intraoperative optical coherence tomography (OCT) in a case of cap-lenticule adhesion during small incision lenticule extraction (SMILE). METHODS: Case report. RESULTS: A 22-year-old patient with a refractive error of -5.00 -0.50 × 120° and -5.00 -0.75 × 60° in the right and left eyes, respectively, was scheduled for SMILE. The lenticule was created using the VisuMax femtosecond laser system (Carl Zeiss Meditec, Jena, Germany)...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117419/secondary-lenticule-remnant-removal-after-smile
#4
Alex L K Ng, Peter S K Kwok, Tommy C Y Chan
PURPOSE: The authors report four cases of residual intrastromal lenticule after seemingly uneventful small incision lenticule extraction (SMILE) surgery and the outcome after a secondary procedure to remove the lenticule remnant. METHODS: Case reports. RESULTS: All four cases presented with suboptimal corrected distance visual acuity (CDVA) and refractive surprise. Irregularities in the corneal curvature and elevation were detected on corneal topography and tomography...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117418/keratoconus-screening-with-dynamic-biomechanical-in-vivo-scheimpflug-analyses-a-proof-of-concept-study
#5
Johannes Steinberg, Nazanin Eslami Amirabadi, Andreas Frings, Juliane Mehlan, Toam Katz, Stephan J Linke
PURPOSE: This proof-of-concept study was designed to analyze the ability of in vivo biomechanical corneal analyses with the corneal visualization Scheimpflug technology (CorvisST; Oculus Optikgeräte, Wetzlar, Germany) to differentiate between normal eyes and eyes with manifest keratoconus after strictly eliminating the potential confounding factors intraocular pressure (IOP) and central corneal thickness (CCT). METHODS: In this retrospective, cross-sectional study, after pairwise matching for CCT and IOP, 29 normal eyes and 29 keratoconic eyes (one eye from each patient) were selected as study population...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117417/repeatability-of-a-commercially-available-adaptive-optics-visual-simulator-and-aberrometer-in-normal-and-keratoconic-eyes
#6
Rohit Shetty, Shruti Kochar, Tushar Grover, Pooja Khamar, Pallak Kusumgar, Kanchan Sainani, Abhijit Sinha Roy
PURPOSE: To evaluate the repeatability of aberration measurement obtained by a Hartmann-Shack aberrometer combined with a visual adaptive optics simulator in normal and keratoconic eyes. METHODS: One hundred fifteen normal eyes and 92 eyes with grade I and II keratoconus, as per the Amsler-Krumeich classification, were included in the study. To evaluate the repeatability, three consecutive measurements of ocular aberrations were obtained by a single operator. Zernike analyses up to the 5th order for a pupil size of 4...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117416/accuracy-of-visual-estimation-of-lasik-flap-thickness
#7
Jason E Brenner, Ali Fadlallah, Kathryn M Hatch, Catherine Choi, Rony R Sayegh, Paul Kouyoumjian, Simon Wu, George T Frangieh, Samir A Melki
PURPOSE: To assess the accuracy of surgeons' visual estimation of LASIK flap thickness when created by a femtosecond laser by comparing it to ultrasound measurements. METHODS: Surgeons were asked to visually estimate the thickness of a femtosecond flap during the procedure. Total corneal thickness was measured by ultrasound pachymetry prior to the procedure and the stromal bed was similarly measured after flap lifting. The estimates from three experienced surgeons (cornea fellowship trained and more than 5 years in practice) were compared to those of three cornea fellows, with each surgeon evaluating 20 eyes (120 total)...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117415/risk-factors-for-opaque-bubble-layer-in-small-incision-lenticule-extraction-smile
#8
Liuyang Li, Julie M Schallhorn, Jiaonan Ma, Lin Zhang, Rui Dou, Yan Wang
PURPOSE: To assess the independent effect of myopia and astigmatism on the risk of the occurrence of opaque bubble layer (OBL) in small incision lenticule extraction (SMILE) and further investigate the relationship between scanning depth and OBL. METHODS: Twenty-two cases and 317 controls were included in a case-control study from the database of Tianjin Eye Hospital from April 2015 to July 2016. Baseline characteristics were recorded and all of the eyes were manually reviewed by two different observers masked to preoperative refractive status...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117414/monovision-lasik-versus-presbyopia-correcting-iols-comparison-of-clinical-and-patient-reported-outcomes
#9
Steven C Schallhorn, David Teenan, Jan A Venter, Julie M Schallhorn, Keith A Hettinger, Stephen J Hannan, Martina Pelouskova
PURPOSE: To compare clinical and quality of life outcomes between patients who underwent monovision LASIK and refractive lens exchange. METHODS: The study comprised 590 patients with refractive lens exchange and 608 patients with monovision LASIK available for 3-month postoperative clinical visits. All patients with refractive lens exchange had a Tecnis Symfony lens (Johnson & Johnson Vision Care, Inc., Santa Ana, CA) in at least one eye. Patients were divided into four refractive categories: moderate to high myopia, low myopia, plano presbyopia, and hyperopia...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117413/comparison-of-wound-sealability-between-femtosecond-laser-constructed-and-manual-clear-corneal-incisions-in-patients-undergoing-cataract-surgery-a-pilot-study
#10
Harvey Siy Uy, Sunil Shah, Mark Packer
PURPOSE: To compare the sealability of femtosecond laser-constructed and manual clear corneal incisions (CCIs) in patients undergoing cataract surgery. METHODS: This prospective, randomized study included 62 eyes of 62 patients with cataract grade 1 to 2 (LOCS scale). The patients were randomly assigned (1:1) for creation of either manual CCI (with a 2.4-mm keratome) or femtosecond laser-assisted CCI (LENSAR, Inc., Orlando, FL) (31 eyes in each group) before undergoing femtosecond laser-assisted cataract surgery...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117412/in-vivo-measurement-of-longitudinal-chromatic-aberration-in-patients-implanted-with-trifocal-diffractive-intraocular-lenses
#11
Maria Vinas, Ana Gonzalez-Ramos, Carlos Dorronsoro, Vyas Akondi, Nuria Garzon, Francisco Poyales, Susana Marcos
PURPOSE: To measure the longitudinal chromatic aberration (LCA) by both psychophysical methods and in vivo double-pass retinal imaging in patients bilaterally implanted with trifocal diffractive intraocular lenses (IOLs). METHODS: Measurements were performed with a polychromatic adaptive optics system provided with a supercontinuum laser, a Hartmann-Shack wavefront sensor, a deformable mirror, a motorized Badal system, a pupil monitoring system, a double-pass retinal imaging channel, and a psychophysical channel with monochromatically illuminated stimuli...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117411/assessing-the-likely-effect-of-posterior-corneal-curvature-on-toric-iol-calculation-for-iols-of-2-50-d-or-greater-cylinder-power
#12
Benjamin R LaHood, Michael Goggin, Adrian Esterman
PURPOSE: To establish whether average refractive overcorrection or undercorrection of corneal astigmatism based on the orientation (rule) of the astigmatism occurs if toric intraocular lenses (IOLs) are calculated on the basis of anterior corneal measurements in eyes requiring toric IOL cylinder power of 2.50 diopters (D) or greater. METHODS: One hundred thirteen consecutive eyes with anterior corneal keratometric astigmatism requiring IOL cylinder power of 2.50 D or greater underwent phacoemulsification with IOL powers calculated using anterior corneal curvature data alone...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117410/corneal-cross-linking-cxl-standardizing-terminology-and-protocol-nomenclature
#13
EDITORIAL
J Bradley Randleman, Marcony R Santhiago, George D Kymionis, Farhad Hafezi
No abstract text is available yet for this article.
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991341/repair-of-irregularly-irregular-astigmatism-by-transepithelial-phototherapeutic-keratectomy
#14
Stefano Guglielmetti, Amy Kirton, Dan Z Reinstein, Glenn I Carp, Timothy J Archer
PURPOSE: To evaluate the outcome of transepithelial phototherapeutic keratectomy (PTK) in the management of irregularly irregular astigmatism. METHODS: This was a case series of two patients who underwent transepithelial PTK for irregularly irregular astigmatism. In the first case, the patient complained of diplopia due to corneal scarring caused by a metallic foreign body injury. The topography demonstrated irregularly irregular astigmatism with significant asymmetry in the inferotemporal to superonasal axis...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991340/comparison-of-corneal-endothelial-cell-loss-between-two-femtosecond-laser-platforms-and-standard-phacoemulsification
#15
Zaina Al-Mohtaseb, Xu He, Nilufer Yesilirmak, Daniel Waren, Kendall E Donaldson
PURPOSE: To analyze and compare the changes in endothelial cell density (ECD) and cumulative dissipated energy (CDE) in patients having cataract surgery with two different femtosecond laser platforms and standard phacoemulsification. METHODS: This prospective non-randomized comparative study included patients scheduled to undergo cataract extraction using femtosecond laser-assisted cataract surgery (FLACS) (60 eyes) or standard phacoemulsification (60 eyes) between September 2013 and March 2016...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991339/pupil-dynamics-induced-by-light-reflex-after-posterior-chamber-phakic-intraocular-lens-implantation
#16
Kazuko Totsuka, Hitoshi Ishikawa, Kazutaka Kamiya, Nobuyuki Shoji, Kimiya Shimizu
PURPOSE: To assess the light reflex of the pupil after Implantable Collamer Lens (ICL) (KS-aquaPORT; STAAR Surgical, Nidau, Switzerland) implantation to determine whether the ICL implantation might affect the pupil dynamics. METHODS: This study examined 28 eyes of 28 consecutive patients who underwent implantation of the posterior phakic ICL for the correction of myopia and astigmatism. Patient age at the time of surgery was 31.1 ± 6.8 years (range: 25 to 42 years)...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991338/age-related-changes-in-corneal-astigmatism
#17
Xu Shao, Kai-Jing Zhou, An-Peng Pan, Xue-Ying Cheng, He-Xie Cai, Jin-Hai Huang, A-Yong Yu
PURPOSE: To analyze the changes in corneal astigmatism as a function of age and develop a novel model to estimate corneal astigmatic change according to age. METHODS: This was a cross-sectional study of right eyes of 3,769 individuals. Total corneal astigmatism, keratometric astigmatism, anterior corneal astigmatism, and posterior corneal astigmatism were measured by a Scheimpflug tomographer. Smoothing fitting curves of polar values of corneal astigmatism as a function of age were drawn and average changes in corneal astigmatism at different ages were calculated...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991337/accuracy-of-a-new-swept-source-optical-coherence-tomography-biometer-for-iol-power-calculation-and-comparison-to-iolmaster
#18
Giacomo Savini, Kenneth J Hoffer, H John Shammas, Jaime Aramberri, Jinhai Huang, Piero Barboni
PURPOSE: To investigate the accuracy of the measurements provided by a new optical biometer (OA-2000, Tomey Corporation, Nagoya, Japan) for calculating the intraocular lens (IOL) power and to compare the refractive outcomes to those obtained with the IOLMaster 500 (Carl Zeiss Meditec, Jena, Germany). METHODS: In this interventional multicenter study, consecutive patients having cataract surgery were enrolled. Only the IOL model used in the largest sample of patients was selected and the eyes implanted with that IOL were subsequently analyzed...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991336/four-stage-procedure-for-keratoconus-icrs-implantation-corneal-cross-linking-toric-phakic-intraocular-lens-implantation-and-topography-guided-photorefractive-keratectomy
#19
Efekan Coskunseven, Daya Papalkar Sharma, Michael A Grentzelos, Onurcan Sahin, George D Kymionis, Ioannis Pallikaris
PURPOSE: To evaluate a four-stage combined treatment for keratoconus including intrastromal corneal ring segment (ICRS) implantation followed by corneal cross-linking (CXL), toric phakic intraocular lens (IOL) implantation, and topography-guided photorefractive keratectomy (TG-PRK). METHODS: In this retrospective interventional case series, 11 eyes of 7 patients with progressive keratoconus were treated with a four-stage procedure including the following: Keraring ICRS (Mediphacos Ltda, Belo Horizonte, Brazil) implantation followed by CXL, phakic IOL implantation, and TG-PRK (minimum 6 months between each stage)...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28991335/customized-corneal-cross-linking-using-different-uva-beam-profiles
#20
Rohit Shetty, Natasha Pahuja, Thimmarayappa Roshan, Rashmi Deshmukh, Mathew Francis, Arkasubhra Ghosh, Abhijit Sinha Roy
PURPOSE: To evaluate the performance of different customized corneal cross-linking (CXL) methods. METHODS: This was a single-center interventional, prospective, longitudinal case series. Four different customized CXL methods were evaluated in keratoconic eyes: (1) uniform (uniform intensity ultraviolet-A [UVA] beam [9 mW/cm(2)] for 10 minutes) (n = 12 eyes); (2) sector axial map (sector-based UVA irradiation) (n = 12 eyes); (3) ring axial map (concentric rings of UVA beam intensity centered at the steepest curvature of the anterior axial map) (n = 12 eyes); and ring tangential map (same as the ring axial map but centered at the steepest curvature of the anterior tangential map) (n = 14 eyes)...
October 1, 2017: Journal of Refractive Surgery
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