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Journal of Refractive Surgery

Hon Shing Ong, Anita S Chan, Christine W Yau, Jodhbir S Mehta
PURPOSE: To present 3 patients who required explantation of KAMRA inlays (AcuFocus, Inc., Irvine, CA) due to visual symptoms caused by postoperative corneal haze. METHODS: Case series. RESULTS: All patients had good near and distance vision immediately following implantation. They developed visual symptoms 3 to 6 years later. All patients reported a decline in distance vision. Two patients had hyperopic shift with flattening of the central cornea...
May 1, 2018: Journal of Refractive Surgery
Ramon Lee, Ahmed El-Massry, Youssef El-Massry, J Bradley Randleman
PURPOSE: To present a case of bilateral, asymmetric keratoconus presenting unilaterally after partial thyroidectomy with delayed presentation in the second eye after thyrotoxicosis, with disease stabilization following corneal cross-linking (CXL). METHODS: Case report and literature review. RESULTS: A 17-year-old girl with a history of Graves' disease underwent partial thyroidectomy without thyroid hormone replacement therapy with normal baseline ophthalmic examination of corrected distance visual acuity (CDVA) of 20/20 and no manifest astigmatism in either eye...
May 1, 2018: Journal of Refractive Surgery
Ramon Lee, Farhad Hafezi, J Bradley Randleman
PURPOSE: To present a case of new-onset, bilateral, rapidly progressive keratoconus induced by secondary hypothyroidism after radioactive iodine therapy during the sixth decade of life that was successfully treated with corneal cross-linking. METHODS: Case report and literature review. RESULTS: A 53-year-old woman with no ocular complaints but with a history of Graves' disease and thyrotoxicosis was treated with radioactive iodine therapy and oral levothyroxine for secondary acquired hypothyroidism 3 years prior...
May 1, 2018: Journal of Refractive Surgery
Meiyan Li, Feng Zhao, Meng Li, Michael C Knorz, Xingtao Zhou
PURPOSE: To describe a case in which post-LASIK corneal ectasia was treated using an allogeneic lenticule implanted into the recipient eye. METHODS: A 29-year-old man presented with bilateral ectasia 10 years after LASIK. Manifest refraction was -1.50 -3.25 × 15° in the right eye and -13.50 -6.00 × 10° in the left eye. Because of contact lens intolerance in the left eye, the authors decided to implant an allogenic corneal lenticule, created by small incision lenticule extraction with the VisuMax laser (Carl Zeiss Meditec, Jena, Germany) in a donor eye with a refraction of +5...
May 1, 2018: Journal of Refractive Surgery
Tim Schultz, Luca Schwarzenbacher, H Burkhard Dick
PURPOSE: To investigate two approaches for femtosecond laser-assisted cataract surgery (FLACS) in patients with phakic intraocular lenses (IOLs). METHODS: Anterior capsulotomy and lens fragmentation were performed with an image-guided femtosecond laser. Laser treatment was performed under sterile conditions prior to (technique 1, 5 cases) or after (technique 2, 5 cases) phakic IOL explantation. RESULTS: In technique 1, gas accumulated between the phakic IOL and the anterior capsule...
May 1, 2018: Journal of Refractive Surgery
Gernot Steinwender, Mehdi Shajari, Thomas Kohnen
PURPOSE: To report the efficacy, predictability, and safety of femtosecond laser-assisted cataract surgery (FLACS) in eyes with anterior chamber phakic intraocular lenses (IOLs). METHODS: This retrospective case series included eyes with previous implantation of an angle-supported and an iris-fixated phakic IOL for the correction of myopia that underwent a combined procedure of phakic IOL ex-plantation and FLACS with in-the-bag implantation of a posterior chamber IOL...
May 1, 2018: Journal of Refractive Surgery
Benjamin R LaHood, Michael Goggin
PURPOSE: To provide the first description of posterior corneal astigmatism as measured by the IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany) and assess how its characteristics compare to previous measurements from other devices. METHODS: A total of 1,098 routine IOLMaster 700 biometric measurements were analyzed to provide magnitudes and orientation of steep and flat axes of anterior and posterior corneal astigmatism. Subgroup analysis was conducted to assess correlation of posterior corneal astigmatism characteristics to anterior corneal astigmatism and describe the distribution of posterior corneal astigmatism with age...
May 1, 2018: Journal of Refractive Surgery
Tiago B Ferreira, Filomena J Ribeiro, João Pinheiro, Paulo Ribeiro, João G O'Neill
PURPOSE: To compare the surgically induced astigmatism (SIA) vector, flattening effect, torque, and wound architecture following femtosecond laser and manual clear corneal incisions (CCIs). METHODS: In a double-armed, randomized, prospective case series, cataract surgery was performed for 600 eyes using femtosecond laser (300 eyes) or manual (300 eyes) 2.4-mm CCIs in temporal or superior oblique locations. SIA, flattening effect, torque, and the summated vector mean for SIA were calculated...
May 1, 2018: Journal of Refractive Surgery
Michael Mimouni, Victor Flores, Tzahi Sela, Gur Munzer, Igor Kaiserman
PURPOSE: To determine the risk factors for re-treatment following LASIK in hyperopic eyes. METHODS: In this retrospective study, consecutive hyperopic eyes underwent LASIK at the Care Vision Laser Centers, Tel-Aviv, Israel, between January 2000 and October 2014. Patients were divided into two groups according to whether or not they underwent additional refractive surgery (re-treatment). Logistic regression was performed to determine predictors of re-treatment. RESULTS: Overall, 1,776 eyes of 888 patients were included, of which 82 (4...
May 1, 2018: Journal of Refractive Surgery
Majid Moshirfar, Andrew E Bean, Julio C Albarracin, Ronald L Rebenitsch, Ryan T Wallace, Orry C Birdsong
PURPOSE: To report a retrospective study of simultaneous LASIK versus photorefractive keratectomy (PRK) with accompanying small-aperture cornea inlay implantation (KAMRA; AcuFocus, Inc., Irvine, CA) in treating presbyopia. METHODS: Simultaneous LASIK/inlay and simultaneous PRK/inlay was performed on 79 and 47 patients, respectively. Follow-up examinations were conducted at 1, 3, and 6 months postoperatively. The main outcome measures were safety, efficacy, predictability, and stability with primary emphasis on monocular uncorrected near visual acuity (UNVA)...
May 1, 2018: Journal of Refractive Surgery
Jakob Siedlecki, Nikolaus Luft, Wolfgang J Mayer, Martin Siedlecki, Daniel Kook, Bertram Meyer, Martin Bechmann, Rainer Wiltfang, Siegfried G Priglinger, Martin Dirisamer
PURPOSE: To report the outcomes of enhancement after small incision lenticule extraction (SMILE) using the VisuMax CIRCLE option (Carl Zeiss Meditec AG, Jena, Germany), which converts the SMILE cap into a femtosecond LASIK flap for secondary excimer laser application. METHODS: Of 2,065 SMILE procedures, 22 eyes (1.1%) re-treated with CIRCLE with a follow-up of 3 months were included in the analysis. SMILE was performed in the usual manner. For re-treatment, the CIRCLE procedure was performed with pattern D flap creation on the VisuMax system and subsequent excimer laser ablation with a Zeiss MEL 90 laser (Carl Zeiss Meditec) with plano target in all cases...
May 1, 2018: Journal of Refractive Surgery
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
Dan Z Reinstein
No abstract text is available yet for this article.
May 1, 2018: Journal of Refractive Surgery
(no author information available yet)
No abstract text is available yet for this article.
May 1, 2018: Journal of Refractive Surgery
Majid Moshirfar, Brian D Walker, Steve H Linn, Orry C Birdsong, Phillip C Hoopes
No abstract text is available yet for this article.
April 1, 2018: Journal of Refractive Surgery
Jose L Hernández-Verdejo, Carolina Arrubarrena, Rafael Cañones, Dimitrious G Mikropoulos, Miguel A Teus
No abstract text is available yet for this article.
April 1, 2018: Journal of Refractive Surgery
Jing Zhao, Feng Zhao, Jinrong Huang, Haipeng Xu, Yingjun Chen, Xingtao Zhou
PURPOSE: To describe a patient with flap complications after LASIK who was subsequently treated using phototherapeutic keratectomy (PTK) and an autologous lenticule transplant obtained via small incision lenticule extraction (SMILE). METHODS: A 23-year-old man experienced free flap and partial flap loss in the left eye following LASIK, resulting in corneal stroma opacity 1 month later. The manifest refraction was -3.25 diopters sphere (DS)/-0.50 diopters cylinder (DC) × 100° in the right eye and +2...
April 1, 2018: Journal of Refractive Surgery
Xiaomin Liu, Lixin Xie, Yusen Huang
PURPOSE: To compare the visual performance after bilateral implantation of a diffractive bifocal or trifocal intraocular lens (IOL) from the same manufacturer using the same IOL platform. METHODS: This prospective, non-randomized, controlled study involved patients who had cataract surgery with bilateral implantation of bifocal or trifocal IOLs. The near, intermediate, and distance visual acuities, defocus curve, optical quality including modulation transfer functions and higher-order aberrations, National Eye Institute Visual Functioning Questionnaire-14, patient satisfaction, spectacle independence, and perception of visual disturbances were assessed in all patients...
April 1, 2018: Journal of Refractive Surgery
Shao-Hsuan Chang, Ashkan Mohammadvali, Kai-Jung Chen, You-Ren Ji, Tai-Horng Young, Tsung-Jen Wang, Colin E Willoughby, Kevin J Hamill, Ahmed Elsheikh
PURPOSE: To determine the relationship between mechanical behavior in cross-linked corneas and changes in the corneal ultrastructure after corneal cross-linking (CXL). METHODS: Porcine corneas were treated following the "Dresden" protocol, the current gold standard for clinical treatment, consisting of dropwise application of 0.1% riboflavin in 20% dextran followed by 30 minutes of ultraviolet-A (UVA) irradiation. The effect of CXL was assessed using uniaxial tensile testing, transmission electron microscopy, and Fourier transform infrared spectroscopy, with results compared against corneas treated with each of the treatment solution components individually...
April 1, 2018: Journal of Refractive Surgery
Nishant Gupta, Bruno L Trindade, Joobin Hooshmand, Elsie Chan
PURPOSE: To evaluate the variation in the best fit sphere radius (BFSR) of curvature on a Scheimpflug corneal tomographer as a test to detect keratoconus progression. METHODS: In this retrospective, comparative, case-control study, two groups of eyes with stable or progressive keratoconus were identified based on keratometric, refractive, and visual acuity criteria. Two sequential scans were used to assess the variation in topometric variables. Receiver operating characteristic analysis was conducted for anterior and posterior BFSR values...
April 1, 2018: Journal of Refractive Surgery
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