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Scleral lens

Beatriz de Luis Eguileor, Jaime Etxebarria Ecenarro, Alaitz Santamaria Carro, Raquel Feijoo Lera
OBJECTIVES: To assess visual function in patients with irregular cornea who do not tolerate gas permeable (GP) corneal contact lenses and are fitted with GP scleral contact lenses (Rose K2 XL). METHODS: In this prospective study, we analyzed 15 eyes of 15 patients who did not tolerate GP corneal contact lenses and were fitted with scleral contact lenses (Rose K2 XL). We assessed visual function using visual acuity and the visual function index (VF-14); we used the VF-14 as an indicator of patient satisfaction...
October 20, 2016: Eye & Contact Lens
Argyrios Chronopoulos, Gabriele Thumann, James Schutz
Positive vitreous pressure (PVP) occurs during anterior segment intraocular surgery associated with acute hypotony and is characterized by forward displacement of the lens-iris diaphragm with shallowing of the anterior chamber resistant to reformation, repeated iris prolapse, and, in severe cases, zonular rupture and vitreous or lens prolapse that can lead to a cascade of intraoperative complications. PVP is particularly common during penetrating keratoplasty (PK), conventional nuclear expression cataract extraction, and repair of anterior open globe injury...
October 14, 2016: Survey of Ophthalmology
Yi-Ju Ho, Hung-Chi Chen, Shirley H L Chang, Lung-Kung Yeh, David Hui-Kang Ma
BACKGROUND: Sclerocornea, a congenital corneal pathology characterized by bilateral scleralization of the cornea, which can be found in few cases with posterior fossa malformationshemangiomas-arterial anomalies-cardiac defects-eye abnormalities-sternal cleft and supraumbilical raphe (PHACES) syndrome. Presence of vascularization in peripheral cornea and smaller diameter of recipient cornea correlate to poor outcome of penetrating keratoplasty (PKP) in sclerocornea. Here we report a method to preserve limbus during PKP for small, irregular, and scleralized cornea...
October 2016: Medicine (Baltimore)
Vicente Compañ, Marcel Aguilella-Arzo, Timothy B Edrington, Barry A Weissman
PURPOSE: The main goal of this current work is to use an updated calculation paradigm, and updated boundary conditions, to provide theoretical guidelines to assist the clinician whose goal is to improve his or her scleral gas permeable (GP) contact lens wearing patients' anterior corneal oxygen supply. METHODS: Our model uses a variable value of corneal oxygen consumption developed through Monod equations that disallows negative oxygen tensions within the stroma to predict oxygen tension at the anterior corneal surface of scleral GP contact lens wearing eyes, and to describe oxygen tension and flux profiles, for various boundary conditions, through the lens, tears, and cornea...
October 12, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Yusuke Ito, Ikuo Yamazaki, Yoichi Kikuchi, Eri O'uchi, Toshihiro O'uchi, Hiroaki Kato, Kazuki Hotta
Recognizing imaging characteristics after ophthalmic surgery is necessary for radiologists to prevent misdiagnosis. We review typical appearances of intraorbital implanted devices and materials on CT and MRI with demonstration of the common surgical procedures. EX-PRESS glaucoma filtration devices appear as punctate areas of metal attenuation on CT and are typically placed at the corneoscleral junction. The imaging manifestations after cataract extraction are absence of the native lens of ovoid mass and the intraocular lens with high attenuation on CT and low signal intensity on MRI...
October 13, 2016: Japanese Journal of Radiology
Fernanda Pacella, Enzo Agostinelli, Sandra Cinzia Carlesimo, Marcella Nebbioso, Roberto Secondi, Michele Forastiere, Elena Pacella
BACKGROUND: Ozurdex is a 700 mcg dexamethasone intravitreal implant, approved for the management of macular edema secondary to retinal vein occlusion, and other related pathoglogiesAnterior chamber dislocation of Ozurdex represents an uncommon complication of the intravitreal injection, which can be managed by repositioning the implant into the vitreous cavity. We describe the case of a successful repositioning of an Ozurdex implant by mobilization and subsequent balanced saline solution injection in the anterior chamber...
October 13, 2016: Journal of Medical Case Reports
Bozho Todorich, Aristomenis Thanos, Yoshihiro Yonekawa, Benjamin J Thomas, Ashkan M Abbey, Lisa J Faia
PURPOSE: Secondary intraocular lens (IOL) placement in uveitic eyes is challenging. We describe a series of sclerally fixated IOLs using a transconjunctival sutureless (SIS) technique in eyes with history of uveitis. METHODS: This is an interventional, retrospective, consecutive case series. RESULTS: Five patients with a history of well-controlled uveitis were included. All underwent vitrectomy, with removal of residual lens fragments if necessary...
October 11, 2016: Ocular Immunology and Inflammation
Qianwen Gong, Miroslaw Janowski, Mingkun Xie, Guoyuan Yang, Longqian Liu
BACKGROUND: Genome-wide association studies of patients have linked the Rasgrf1 gene with myopia. The aim of this study was to investigate the messenger RNA (mRNA) expression of Rasgrf1 in the eyes of guinea pigs with induced myopia. METHODS: The myopia was induced by form deprivation in 24 guinea pigs, while additional 12 animals served as a control. Biometric measurements were used to monitor myopic progression. The animals were sacrificed at two, three and four weeks after beginning of the monocular form deprivation, followed by dissection of the retina, and the sclera, as well as mRNA isolation from both layers...
October 9, 2016: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
Sang-Mok Lee, Hyuk Jin Choi, Heejin Choi, Mee Kum Kim, Won Ryang Wee
: BACKGROUND: Though the development and fitting of scleral contact lenses are expanding steadily, there is no simple method to provide scleral metrics for scleral contact lens fitting yet. The aim of this study was to establish formulae for estimation of the axial radius of curvature (ARC) of the anterior sclera using ocular biometric parameters that can be easily obtained with conventional devices. METHODS: A semi-automated stitching method and a computational analysis tool for calculating ARC were developed by using the ImageJ and MATLAB software...
October 7, 2016: BMC Ophthalmology
Jing Lu, Guiying Mai, Yan Luo, Mei Li, Di Cao, Xiao Wang, Hong Yan, SriniVas R Sadda, Lin Lu
PURPOSE: To characterize the appearance of the far peripheral retina of normal eyes using ultra-widefield fluorescein angiography (UWFA). DESIGN: Cross-sectional study. METHODS: This study enrolled 101 eyes with best corrected visual acuity ≥ 20/20, refractive error < 3.00D, and without visible retinal pathologic changes under a slit lamp-based condensing lens. The far peripheral retina was detected by UWFA. Ciliary body thickness (CBT) at 3 mm (CBT1) and 2 mm (CBT2) posterior to the scleral spur was measured by ultrasound biomicroscopy...
September 29, 2016: American Journal of Ophthalmology
Hu-Ping Song, Bing-Yu Tian, Jing Peng
AIM: To evaluate the efficacy of toric intraocular lens markers-assisted implantation of the scleral-fixated intraocular lens (SFIOL). METHODS: From October 2010 to December 2013, all patients who had undergone secondary SFIOL implantation were assigned to group 1 and 2, in group 1 SFIOL was performed with the assist of radial keratotomy (RK)-marker, and in group 2 SFIOL was performed with the assisted of toric intraocular lens markers (T-and axis markers). Patients' demographic data and information on baseline preoperative visual acuity, indication for surgery and latest postoperative visual acuity were collected and analyzed...
2016: International Journal of Ophthalmology
Takashi Kojima, Asato Hasegawa, Tomoaki Nakamura, Naoki Isogai, Takahiro Kataoka, Kazuo Ichikawa
PURPOSE: Aniridic keratopathy is vision-threatening condition in patients with aniridia. The keratopathy occurs due to limbal stem cell deficiency. When conventional treatments fail, surgical treatments such as corneal limbal transplantation or cultivated oral mucosal epithelium transplantation are the alternatives. Here, we report our experience with the management and monitoring of the progress of a case with aniridic keratopathy treated with a scleral lens. CASE REPORT: We describe the case of a 30-year-old woman with aniridic keratopathy in both eyes...
October 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
James E Neffendorf, Bhaskar Gupta, Tom H Williamson
PURPOSE: To compare the intraoperative complications between 23-G and 20-G instrumentation in patients undergoing pars plana vitrectomy (PPV). METHODS: This was a retrospective comparative study of 4,274 PPV procedures by the same surgical team between 1998 and 2016. A total of 2,648 operations were carried out with 20-G surgery and 1,626 operations with 23-G surgery. Main outcome measures were the incidence of choroidal haemorrhage, iatrogenic retinal break, and lens touch...
September 9, 2016: European Journal of Ophthalmology
Francisco Pérez Bartolomé, Jose María Martínez de la Casa, Irene Camacho Bosca, Federico Sáenz-Francés, Soledad Aguilar Munoa, Alberto Martín Juan, Julian Garcia-Feijoo
PURPOSE: To examine interrelations between corneal biomechanics, ocular biometric variables and optic disc size (ODS), lamina cribosa depth (LCD) or thickness (LCT) in a healthy population. MATERIAL AND METHODS: In a cross-sectional case-control study, the following measurements were made in 81 eyes of 81 participants: axial length, anterior chamber depth, lens thickness, and central corneal thickness using the optical biometer Lenstar LS900; and corneal hysteresis (CH), corneal resistance factor (CRF), Goldman-correlated intraocular pressure (IOPg), and corneal-compensated IOP (IOPcc) using the Ocular Response Analyzer...
September 14, 2016: Seminars in Ophthalmology
Farideh Sharifipour, Saman Nassiri, Aida Idan
PURPOSE: To present a case of total Descemet's membrane detachment (DMD) after trabeculectomy and its surgical management. CASE REPORT: A 68-year-old woman presented with large DMD and corneal edema one day after trabeculectomy. Intracameral air injection on day 3 was not effective. Choroidal effusion complicated the clinical picture with Descemet's membrane (DM) touching the lens. Choroidal tap with air injection on day 6 resulted in DM attachment and totally clear cornea on the next day...
July 2016: Journal of Ophthalmic & Vision Research
Vinod Kumar, Brijesh Takkar
PURPOSE: To evaluate the results of intravitreal phacoemulsification with torsional hand piece in eyes with posteriorly dislocated lens fragments. METHODS: In this prospective, interventional case series, 15 eyes with retained lens fragments following phacoemulsification were included. All patients underwent standard three-port pars plana vitrectomy and intravitreal phacoemulsification using sleeveless, torsional hand piece (OZiL™, Alcon's Infiniti Vision System)...
July 2016: Journal of Ophthalmic & Vision Research
Fatemeh Alipour, Firoozeh Rahimi, Mohammad Naser Hashemian, Zahra Ajdarkosh, Ramak Roohipoor, Masoumeh Mohebi
PURPOSE: To evaluate the feasibility and efficacy of mini-scleral design (MSD) contact lenses to treat keratoconus patients who were unsatisfied with the results of corneal inlay. METHODS: In this prospective interventional case series, 9 eyes of 6 keratoconus patients who were unsatisfied with the results of corneal inlay were fitted with MSD contact lenses. Demographic data, uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), and higher order aberrations (HOAs) were evaluated before contact lens fitting...
July 2016: Journal of Ophthalmic & Vision Research
Elvin Yildiz, Meltem Tunca Toklu, Ece Turan Vural, Nursal Melda Yenerel, Handan Bardak, Esra Turkseven Kumral, Yavuz Bardak
PURPOSE: To evaluate the accommodative response to different accommodative stimulus and to determine the changes in ocular higher-order aberrations with accommodation in keratoconus patients fitted with mini scleral lenses. MATERIAL AND METHODS: The study included 15 keratoconus patients wearing mini scleral lenses (Misa Scleral Lens-Microlens, Arnhem, the Netherlands) and 15 keratoconus patients wearing rigid gas permeable lenses. Hartmannn Shack aberrometer (IRX-3; Imagine Eyes, Orsay, France) was used for the evaluation of accommodation...
September 7, 2016: Eye & Contact Lens
Bing Liu, Da-Dong Guo, Xiu-Juan Du, Chen-Yang Cong, Xiao-Hua Ma
To evaluate the safety and efficacy of Ex-PRESS (R50) implantation combined with phacoemulsification in primary angle-closure glaucoma (PACG) patients with cataract.Twenty-four eyes of 24 patients with unregulated PACG underwent combined cataract and glaucoma surgery. After phacoemulsification and intraocular lens implantation, the Ex-PRESS (R-50) was inserted into the anterior chamber under a scleral flap. The intraocular pressure (IOP), best corrected visual acuity (BCVA), number of medications, and complications were recorded preoperatively as well as postoperatively on day 7 and at 1, 3, 6, and 12 months...
September 2016: Medicine (Baltimore)
Remzi Karadag, Haci Ugur Celik, Huseyin Bayramlar, Christopher J Rapuano
PURPOSE: To review sutureless intrascleral intraocular lens (IOL) fixation methods. METHODS: Review of published literature. RESULTS: Sutureless intrascleral IOL fixation methods are newer and have been developed to eliminate the suture-related complications of sutured scleral fixation methods such as suture-induced inflammation or infection and IOL dislocation or subluxation due to suture degradation or suture breakage. Sutureless intrascleral fixation methods aim for intrascleral haptic fixation to achieve stability of the IOL...
August 1, 2016: Journal of Refractive Surgery
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