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Journal of Refractive Surgery

Natalia S Anisimova, Boris E Malyugin, Lisa B Arbisser, Nikolay P Sobolev, Roman V Kirtaev, Alvi A Nazirov, Ilya A Popov
PURPOSE: To describe a case of femtosecond laser-assisted hydrophobic intraocular lens transection. METHODS: Case report. RESULTS: Femtosecond laser-assisted transection of a one-piece acrylic hydrophobic intraocular lens for explantation via a small surgical incision was successfully performed with low energy parameters. CONCLUSIONS: This case illustrates a novel and effective clinical application of the femtosecond laser...
September 1, 2017: Journal of Refractive Surgery
Nir Sorkin, Adi Einan-Lifshitz, Tanguy Boutin, Mahmood Showail, Armand Borovik, Clara C Chan, David S Rootman
PURPOSE: To report the outcome of topography-guided photorefractive keratectomy (TG-PRK) in the treatment of patients with corneal scarring. METHODS: A retrospective, interventional case series including 6 eyes of 6 patients with corneal scarring and irregular astigmatism who underwent TG-PRK. The etiologies for scarring were: infectious corneal ulcers, foreign body trauma, LASIK flap buttonhole, and lamellar keratoplasties performed to correct corneal perforation secondary to corneal melting...
September 1, 2017: Journal of Refractive Surgery
Yu Meng Wang, Tommy C Y Chan, Marco Yu, Vishal Jhanji
PURPOSE: To investigate and compare the diagnostic ability of corneal tomography and dynamic corneal response to differentiate between normal eyes and those with forme fruste keratoconus and keratoconus. METHODS: Corneal tomography was performed using Pentacam (Pentacam HR; Oculus Optikgeräte, Wetzlar, Germany). Corneal deformation response was captured via Corvis ST (Optikgeräte) using a beta version of Corvis software. Classification analysis between normal eyes and eyes with forme fruste keratoconus and between normal and keratoconic eyes was evaluated using receiver operating characteristic curves...
September 1, 2017: Journal of Refractive Surgery
Ryan N Mercer, George O Waring, Cynthia J Roberts, Vishal Jhanji, Yumeng Wang, Joao S Filho, Richard A Hemings, Karolinne M Rocha
PURPOSE: To evaluate and compare biomechanical properties in normal and keratoconic eyes using a dynamic ultra-high-speed Scheimpflug camera equipped with a non-contact tonometer (Corvis ST; Oculus Optikgeräte GmbH, Wetzlar, Germany). METHODS: This retrospective study evaluated 89 eyes (47 normal, 42 keratoconic) and a validation arm of 72 eyes (33 normal, 39 keratoconic) using the Corvis ST. A diagnosis of keratoconus was established by clinical findings confirmed by topography and tomography...
September 1, 2017: Journal of Refractive Surgery
Yong Woo Ji, Minseo Kim, David Sung Yong Kang, Dan Z Reinstein, Timothy J Archer, Jin Young Choi, Eung Kweon Kim, Hyung Keun Lee, Kyoung Yul Seo, Tae-Im Kim
PURPOSE: To determine the effect of lowering femtosecond laser energy on the surface quality of the intrastromal interface during small incision lenticule extraction (SMILE). METHODS: Forty age- and diopter-matched female patients (40 eyes) with moderate myopia received SMILE with different energy levels (100 to 150 nJ) and fixed spot separation (4.5 μm). Five human corneal lenticules from each energy group were evaluated by atomic force microscopy and scanning electron microscopy (SEM)...
September 1, 2017: Journal of Refractive Surgery
Youssef Abdelmassih, Sylvain El-Khoury, Elias Chelala, Elise Slim, Carole G Cherfan, Elias Jarade
PURPOSE: To evaluate 6-month and 2-year safety and clinical outcomes of Visian toric Implantable Collamer Lens (toric ICL) (STAAR Surgical, Monrovia, CA) implantation for the treatment of residual refractive errors after sequential intracorneal ring segments (ICRS) insertion and cross-linking (CXL) in keratoconus. METHODS: This consecutive case series included the results of a three-step ICRS-CXL-toric ICL procedure in 16 eyes of 13 patients with moderate to severe keratoconus (stages II and III of Amsler-Krumeich classification)...
September 1, 2017: Journal of Refractive Surgery
Efekan Coskunseven, Isilay Kavadarli, Onurcan Sahin, Belma Kayhan, Ioannis Pallikaris
PURPOSE: To analyze 1-week, 1-month, and 12-month postoperative refractive outcomes of eyes that under-went ICL implantation to correct hyperopic astigmatism. METHODS: The study enrolled 20 eyes of patients with an average age of 32 years (range: 21 to 40 years). The outcomes of spherical and cylindrical refraction, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), vault, and angle parameters were evaluated 1 week, 1 month, and 12 months postoperatively...
September 1, 2017: Journal of Refractive Surgery
Kazutaka Kamiya, Akihito Igarashi, Ken Hayashi, Kazuno Negishi, Masaki Sato, Hiroko Bissen-Miyajima
PURPOSE: To retrospectively evaluate the current practice, trends, and outcomes of refractive surgery in Japan. METHODS: This multicenter survey comprised 78,248 eyes of 39,727 consecutive patients who underwent refractive surgery at 45 major institutions in Japan. The corresponding ophthalmologists responded to a selfadministered questionnaire. The authors especially evaluated the safety, efficacy, predictability, stability, and adverse events of LASIK and phakic intraocular lens (IOL) implantation 3 months postoperatively...
September 1, 2017: Journal of Refractive Surgery
Asaf Achiron, Zvi Gur, Uri Aviv, Assaf Hilely, Michael Mimouni, Lily Karmona, Lior Rokach, Igor Kaiserman
PURPOSE: To develop a decision forest for prediction of laser refractive surgery outcome. METHODS: Data from consecutive cases of patients who underwent LASIK or photorefractive surgeries during a 12-year period in a single center were assembled into a single dataset. Training of machine-learning classifiers and testing were performed with a statistical classifier algorithm. The decision forest was created by feature vectors extracted from 17,592 cases and 38 clinical parameters for each patient...
September 1, 2017: Journal of Refractive Surgery
Ningling Wu, Joseph G Christenbury, Jon G Dishler, Tahir Kansu Bozkurt, Daniel Duel, Lijun Zhang, D Rex Hamilton
PURPOSE: To identify risk factors for opaque bubble layer (OBL) formation and compare the incidence of OBL using a cone modification technique versus the original technique for LASIK flap creation using the VisuMax laser (Carl Zeiss Meditec, Jena, Germany). METHODS: This retrospective study examined videos of flap creation using the VisuMax laser to identify OBL occurrence. Eyes were divided into three groups: eyes where OBL occurred using the original technique (OBL group), eyes where OBL did not occur using the original technique (no OBL group), and eyes in which the cone modification technique was used for LASIK flap creation (larger flap diameter) (cone modification technique group)...
September 1, 2017: Journal of Refractive Surgery
Luca Gualdi, Federica Gualdi, Dario Rusciano, Renato Ambrósio, Marcella Q Salomão, Bernardo Lopes, Veronica Cappello, Tatiana Fintina, Massimo Gualdi
PURPOSE: To report short-term results of pulsed ciliary muscle electrostimulation to improve near vision, likely through restoring accommodation in patients with emmetropic presbyopia. METHODS: In a prospective non-randomized trial, 27 patients from 40 to 51 years old were treated and 13 age- and refraction-matched individuals served as untreated controls. All patients had emmetropia and needed near sphere add between +0.75 and +1.50 diopters. The protocol included four sessions (one every 2 weeks within a 2-month period) of bilateral pulsed (2 sec on; 6 sec off) micro-electrostimulation with 26 mA for 8 minutes, using a commercially available medical device...
September 1, 2017: Journal of Refractive Surgery
Theo G Seiler, Beatrice E Frueh, Theo Seiler
No abstract text is available yet for this article.
August 1, 2017: Journal of Refractive Surgery
Merita Schojai, Tim Schultz, H Burkhard Dick
PURPOSE: To describe a new technique for implantation of capsule-fixated intraocular lenses (IOLs) (FEMTIS; Oculentis, Berlin, Germany) in patients with small pupils. METHODS: In 4 eyes with small pupils, an anterior capsule-fixated IOL was implanted into the capsular bag after femtosecond laser treatment. The two large and two small flaps of the IOL were elevated to the front of the iris and the anterior capsule. Finally, the iris was flipped over the flaps to ensure a fixation of the capsule inside of the capsulotomy...
August 1, 2017: Journal of Refractive Surgery
Sri Ganesh, Sheetal Brar
PURPOSE: To describe a "no dissection" technique of lenticule removal in small incision lenticule extraction (SMILE). METHODS: After docking and laser delivery, a microforceps is used to grasp and gently peel off the lenticule from the underlying stromal bed, without performing any dissection of the upper and lower planes of the lenticule. Prerequisites are a surgeon experienced in the conventional SMILE technique, optimized laser energy settings, and a minimum peripheral lenticule thickness of 25 to 30 µm...
August 1, 2017: Journal of Refractive Surgery
Hassan Hashemi, Soheila Asgari, Shiva Mehravaran, Mohammad Miraftab, Reza Ghaffari, Akbar Fotouhi
PURPOSE: To determine 1-year corneal biomechanical changes after accelerated corneal cross-linking in patients with progressive keratoconus and compare them between 5-minute (18 mW/cm(2)) and 10-minute (9 mW/cm(2)) protocols. METHODS: In this non-randomized clinical trial, cases in both groups were examined with the Corneal Visualization Scheimpflug Technology (Corvis ST; Oculus Optikgeräte GmbH, Wetzlar, Germany) at baseline and at 6 and 12 months after treatment...
August 1, 2017: Journal of Refractive Surgery
Imène Salah-Mabed, Alain Saad, Damien Gatinel
PURPOSE: To assess the repeatability of measuring pupil dynamics using an infrared pupillometer. METHODS: A total of 124 eyes of 124 patients scheduled for corneal laser refractive surgery were separated into myopic and hyperopic groups and further subdivided based on high or low levels of astigmatism. Measurements were taken using dynamic pupillometry (Topolyzer Vario; Alcon Laboratories, Inc., Sinking Spring, PA). Main outcome measures were pupil diameter size, the distance between the pupil center and the keratoscopic axis, and the spatial shift of the pupil center...
August 1, 2017: Journal of Refractive Surgery
Noel Alpins, James K Y Ong, George Stamatelatos
PURPOSE: To demonstrate how to determine the historical coupling adjustments of bitoric mixed astigmatism ablative treatments and how to use these historical coupling adjustments to adjust future bitoric treatments. METHODS: The individual coupling adjustments of the myopic and hyperopic cylindrical components of a bitoric treatment were derived empirically from a retrospective study where the theoretical combined treatment effect on spherical equivalent was compared to the actual change in refractive spherical equivalent...
August 1, 2017: Journal of Refractive Surgery
Mauro C Tiveron, Jorge L Alió Del Barrio, Newton Kara-Junior, Ana Belén Plaza-Puche, Sabat K Abu-Mustafa, Ghassan Zein, Jorge L Alió
PURPOSE: To assess visual and refractive outcomes of toric iris-claw phakic intraocular lens (IOL) implantation in patients who had previously undergone deep anterior lamellar keratoplasty (DALK). METHODS: Retrospective case series including 24 eyes of 24 patients implanted with toric Artiflex or Artisan (Ophtec BV, Groningen, Holland) phakic IOL following DALK for keratoconus. During a 12-month follow-up, the main outcome measures were uncorrected and corrected distance visual acuities (UDVA and CDVA), refractive error components, topographic parameters, and endothelial cell count...
August 1, 2017: Journal of Refractive Surgery
Sherif A Eissa, Mohamed M Khafagy, Mohamed Karim Sidky
PURPOSE: To assess Visian Implantable Collamer Lens (ICL) (STAAR Surgical, Monrovia, CA) implantation in the ciliary sulcus to correct pseudophakic ametropia in patients who are not candidates for a keratorefractive procedure. METHODS: The authors performed a prospective non-comparative case series study of 18 patients (age: 48 to 61 years) with refractive surprise after phacoemulsification. Patients underwent implantation of a piggyback collagen copolymer lens: V4C design in 16 myopic eyes and V4B design in 2 hyperopic eyes...
August 1, 2017: Journal of Refractive Surgery
Fangjun Bao, Giacomo Savini, Bao Shu, Senmiao Zhu, Rongrong Gao, Guanxin Dang, Ayong Yu, Qinmei Wang, Jinhai Huang
PURPOSE: To evaluate the intraoperator repeatability and interoperator reproducibility of two Scheimpflug-Placido anterior corneal analyzers (Sirius; Costruzione Strumenti Oftalmici, Florence, Italy, and TMS-5; Tomey, Nagoya, Japan) for the measurement of posterior corneal surface in normal eyes and the agreement between the two devices. METHODS: The current prospective study investigated 55 right eyes of 55 healthy patients in a random order. The posterior steep keratometry (Ks), flat keratometry (Kf), mean keratometry (Km), and astigmatism were randomly measured by two independent experienced operators using the Sirius and TMS-5 Scheimpflug-Placido systems...
August 1, 2017: Journal of Refractive Surgery
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