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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
Meng-Ying Qi, Qian Chen, Qing-Yan Zeng
PURPOSE: To identify associations between crystalline lens-related factors and central vault after Implantable Collamer Lens (ICL) (Staar Surgical, Monrovia, CA) implantation. METHODS: This retrospective clinical study included 320 eyes from 186 patients who underwent ICL implantation surgery. At 1 year after surgery, the central vault was measured using anterior segment optical coherence tomography. Preoperative anterior chamber depth, lens thickness, lens position (lens position = anterior chamber depth + 1/2 lens thickness), and vault were analyzed to investigate the effects of lens-related factors on postoperative vault...
August 1, 2017: Journal of Refractive Surgery
Jakob Siedlecki, Nikolaus Luft, Daniel Kook, Christian Wertheimer, Wolfgang J Mayer, Martin Bechmann, Rainer Wiltfang, Siegfried G Priglinger, Walter Sekundo, Martin Dirisamer
PURPOSE: To report the feasibility and outcomes of surface ablation after small incision lenticule extraction (SMILE). METHODS: In this retrospective evaluation of 1,963 SMILE procedures, 43 eyes (2.2%) were re-treated at three separate clinics. Of these, 40 eyes of 28 patients with a follow-up of at least 3 months were included in the analysis. During surface ablation, mitomycin C was applied for haze prevention. RESULTS: Spherical equivalent was -6...
August 1, 2017: Journal of Refractive Surgery
Sri Ganesh, Sheetal Brar, Archana Pawar
PURPOSE: To study the safety, efficacy, and outcomes of manual cyclotorsion compensation in small incision lenticule extraction (SMILE) for myopic astigmatism. METHODS: Eligible patients with myopia from -1.00 to -10.00 diopters (D) spherical equivalent with a minimum astigmatism of 0.75 D undergoing SMILE were included. Intraoperative cyclotorsion compensation was performed by gently rotating the cone and aligning the 0° to 180° limbal marks with the horizontal axis of the reticule of the right eye piece of the microscope of the femtosecond laser after activating the suction...
August 1, 2017: Journal of Refractive Surgery
Abhijit Sinha Roy, Rohit Shetty
No abstract text is available yet for this article.
July 1, 2017: Journal of Refractive Surgery
Xiangjun Chen, Aleksandar Stojanovic, Yangyang Xu, Wen Zhou, Sten Raeder, Sam Enayati, Tor Paaske Utheim
PURPOSE: To evaluate the medium- to long-term outcomes of corneal cross-linking in treatment of keratoconus using transepithelial phototherapeutic keratectomy (PTK-CXL) for epithelial removal and partial stromal ablation to stabilize the cornea, reduce corneal irregularity, and improve corrected vision. METHODS: Retrospective analysis of 46 keratoconic eyes that underwent PTK-CXL. Corrected distance visual acuity (CDVA), manifest refraction, steep and flat simulated keratometry (Kmax and Kmin), corneal irregularity index (IRI), corneal higher order aberrations (HOAs), epithelial thickness profile, and corneal biomechanical characteristics were evaluated preoperatively and postoperatively...
July 1, 2017: Journal of Refractive Surgery
Arjan S Hura, Robert H Osher
PURPOSE: To compare the alignment meridian generated by the Zeiss Callisto Eye (Carl Zeiss AG, Dublin, CA) and the Alcon Verion Image Guided System (Alcon Laboratories, Inc., Fort Worth, TX). METHODS: In this retrospective comparative evaluation of technology, intraoperative images were captured at different steps in the same surgery, allowing the comparison of the guidance lines generated by the Verion system to the parallel guidance lines generated by the Callisto Eye system...
July 1, 2017: Journal of Refractive Surgery
Giacomo Savini, Kenneth J Hoffer, Piero Barboni, Domenico Schiano Lomoriello, Pietro Ducoli
PURPOSE: Given that a previous study found that corneal asphericity influences the refractive outcome of intraocular lens (IOL) power calculation by means of thin-lens formulas in eyes with spherical IOLs, the authors aimed to verify whether such influence can also be observed in eyes with aspherical IOLs. METHODS: In this retrospective comparative case series, IOL power was calculated with the Haigis, Hoffer Q, Holladay 1, and SRK/T formulas in two groups of eyes undergoing phacoemulsification and implantation of an aspherical IOL (Acrysof SN60WF; Alcon Laboratories, Inc...
July 1, 2017: Journal of Refractive Surgery
Alfredo Amigó, Paula Martinez-Sorribes, Margarita Recuerda
PURPOSE: To study the effect on vision of induced negative and positive spherical aberration within the range of laser vision correction procedures. METHODS: In 10 eyes (mean age: 35.8 years) under cyclopegic conditions, spherical aberration values from -0.75 to +0.75 µm in 0.25-µm steps were induced by an adaptive optics system. Astigmatism and spherical refraction were corrected, whereas the other natural aberrations remained untouched. Visual acuity, depth of focus defined as the interval of vision for which the target was still perceived acceptable, contrast sensitivity, and change in spherical refraction associated with the variation in pupil diameter from 6 to 2...
July 1, 2017: Journal of Refractive Surgery
Tae Gi Kim, Sung Rae Noh, Kyung Hyun Jin
PURPOSE: To compare the effects of the distance from the inner and outer corneal incision wounds to the corneal apex on the changes in corneal astigmatism after cataract surgery. METHODS: Seventy-two eyes with anterior corneal astigmatism less than 2.50 diopters (D) were evaluated. The distance between the incision wound and the corneal apex was measured using the Pentacam (Oculus Optikgeräte, Wetzlar, Germany) Scheimpflug image and the Image J program (National Institutes of Health, Bethesda, MD)...
July 1, 2017: Journal of Refractive Surgery
Ate Altenburg, Sorcha S Ní Dhubhghaill, Marie-José Tassignon
PURPOSE: To describe the outcome of a novel capsular or sulcular device to support the bag-in-the-lens (BIL) implant in cases of capsular or zonular instability. Bean-shaped ring segments or 'beans' (Morcher GmbH, Stuttgart, Germany) are designed to fit the groove of the BIL and may be placed in either the capsule or the ciliary sulcus in cataract cases with loose zonules or unstable capsule. METHODS: This was a retrospective single center observational study of all consecutive cases of bean implantation between May 2011 and April 2015...
July 1, 2017: Journal of Refractive Surgery
Ibrahim Seven, Ali Vahdati, Iben Bach Pedersen, Anders Vestergaard, Jesper Hjortdal, Cynthia J Roberts, William J Dupps
PURPOSE: Computational analyses were performed to quantify and directly compare the biomechanical impact of flapless and flap-based procedures in a series of patients undergoing small incision lenticule extraction (SMILE) in one eye and flap-based femtosecond lenticule extraction in the other. METHODS: Tomographic data from 10 eyes of 5 patients undergoing femtosecond laser refractive lenticule extraction for myopic astigmatism with or without a stromal flap (femtosecond lenticule extraction in one eye, SMILE in the contralateral eye) were used to generate computational models...
July 1, 2017: Journal of Refractive Surgery
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