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https://www.readbyqxmd.com/read/29755816/does-dry-eye-affect-repeatability-of-corneal-topography-measurements
#1
Aysun Şanal Doğan, Canan Gürdal, Mehmet Talay Köylü
Objectives: The purpose of this study was to assess the repeatability of corneal topography measurements in dry eye patients and healthy controls. Materials and Methods: Participants underwent consecutive corneal topography measurements (Sirius; Costruzione Strumenti Oftalmici, Florence, Italy). Two images with acquisition quality higher than 90% were accepted. The following parameters were evaluated: minimum and central corneal thickness, aqueous depth, apex curvature, anterior chamber volume, horizontal anterior chamber diameter, iridocorneal angle, cornea volume, and average simulated keratometry...
April 2018: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29738584/corneal-allogenic-intrastromal-ring-segments-cairs-combined-with-corneal-cross-linking-for-keratoconus
#2
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
https://www.readbyqxmd.com/read/29730856/comparison-of-densitometric-profile-after-deep-lamellar-keratoplasty-with-two-different-techniques-for-treatment-of-keratoconus
#3
Mohammad Ghoreishi, Abolfazl Kashfi, Mohammadreza Peyman, Shahriar Hanjani, Mohaddese Mohammadinia, Mike Straiko
PURPOSE: To compare densitometric outcome of two techniques of deep lamellar keratoplasty using Pentacam HR corneal densitometry software. METHODS: Postoperative outcomes of 31 patients with big bubble (BB) and 28 patients with Melles (M) surgery for the treatment of keratoconus were evaluated. Data were gathered at least 3 months after the removal of all sutures including demographic data, uncorrected distance visual acuity (UCDVA), best spectacle-corrected visual acuity (BSCVA), refraction and endothelial cell count...
May 5, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29728290/posterior-cornea-and-thickness-changes-after-scleral-lens-wear-in-keratoconus-patients
#4
Maria Serramito, Carlos Carpena-Torres, Jesús Carballo, David Piñero, Michael Lipson, Gonzalo Carracedo
PURPOSE: To evaluate the changes in the corneal thickness, anterior chamber depth and posterior corneal curvature and aberrations after scleral lens wear in keratoconus patients with and without intrastromal corneal ring segments (ICRS). METHODS: Twenty-six keratoconus subjects (36.95 ± 8.95 years) were evaluated after 8 h of scleral lens wear. The subjects were divided into two groups: those with ICRS (ICRS group) and without ICRS (KC group). The study variables evaluated before and immediately after scleral lens wear included corneal thickness evaluated in different quadrants, posterior corneal curvature at 2, 4, 6 and 8 mm of corneal diameter, posterior corneal aberrations for 4, 6 and 8 mm of pupil size and anterior chamber depth...
May 1, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29685130/cataract-surgery-in-patients-with-corneal-opacities
#5
Yi-Ju Ho, Chi-Chin Sun, Hung-Chi Chen
BACKGROUND: Investigating the efficacy and safety of phacoemulsification with intraocular lens (IOL) implantation in corneal opacities. METHODS: This retrospective study was conducted in a tertiary medical center. Twenty-three eyes of 19 patients with cataracts and corneal opacities obscuring the pupillary center having received phacoemulsification with IOL insertion without any ancillary techniques were enrolled. The primary study outcome measures were uncorrected and best corrected visual acuity (BCVA), and complications...
April 23, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29681179/-femtosecond-laser-assisted-keratoplasty
#6
László Módis, Eszter Szalai, Zsuzsanna Flaskó, Bence Kolozsvári, András Berta
INTRODUCTION AND AIM: To present our results on femtosecond laser-assisted penetrating keratoplasty. PATIENTS AND METHOD: Twenty-five eyes of 25 patients underwent surgery with the following indications: pseudophakic bullous keratopathy (n = 10), keratoconus (n = 4), corneal dystrophy (n = 5), corneal scar (n = 4), band keratopathy (n = 2). Trephination of both the donor and recipient corneas were performed with VisuMax femtosecond laser device (Carl Zeiss Meditec AG, Jena, Germany)...
April 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29658366/a-novel-case-using-femtosecond-laser-acquired-lenticule-for-recurrent-pterygium-case-report-and-literature-review
#7
Om Prakash Pant, Ji-Long Hao, Dan-Dan Zhou, Fan Wang, Cheng-Wei Lu
Small incision lenticule extraction (SMILE) is a minimally invasive, safe and flapless femtosecond laser technique used mainly to correct myopia through extraction of a corneal lenticule. Lenticules obtained in this way are transparent and of high quality, and thus, can be used to treat other corneal diseases. A 65-year-old male patient presented with recurrent pterygium complicated by thin cornea. The patient was treated surgically using a SMILE-extracted lenticule to avoid further complications and to maintain eyeball integrity...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29643799/optical-coherence-tomography-examination-of-the-anterior-segment-in-a-case-of-corneal-perforation-and-lens-trauma-by-chestnut-burr
#8
Takashi Ono, Yosai Mori, Ryohei Nejima, Takuya Iwasaki, Shiro Amano, Kazunori Miyata
Chestnut burrs, the thorny encapsulation of chestnut fruit, can sometimes cause corneal injuries and ulceration, with poor prognoses. We report a case of corneal perforation and damaged anterior lens capsule due to a chestnut burr, using anterior segment optical coherence tomography (AS-OCT). A 67-year-old woman with a chestnut burr injury in her right eye was referred to our hospital. Her right best-corrected visual acuity (BCVA) was 0.8. Slit-lamp examination and AS-OCT showed perforation involving the endothelial layer at the center of the cornea...
January 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29625458/what-are-the-characteristics-of-primary-angle-closure-with-longer-axial-length
#9
Mengwei Li, Yuhong Chen, Zhenying Jiang, Xiaoxiao Chen, Junyi Chen, Xinghuai Sun
Purpose: To compare biometric parameters between primary angle closure with longer axial length (AL) and those with medium or shorter AL. Methods: We prospectively recruited 138 primary angle-closure patients. Low-coherence interferometry and ultrasound biomicroscopy examinations were performed before laser peripheral iridotomy and pilocarpine treatment. AL was categorized as shorter (<22.5 mm), medium (≥22.5 to <23.5 mm), or longer (≥23.5 mm). Anterior chamber depth and width (ACD and ACW), lens vault (LV), anterior vault (AV), relative AV (AV/AL), relative lens position (RLP, [ACD + 1/2 lens thickness]/AL), trabecular-ciliary angle (TCA), keratometry, and other biometric parameters were compared among different AL groups...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29604391/macular-corneal-dystrophy-a-review
#10
REVIEW
Shruti Aggarwal, Travis Peck, Jeffrey Golen, Zeynel A Karcioglu
Macular corneal dystrophy (MCD) is a corneal stromal dystrophy which leads to progressive vision loss. MCD is an autosomal recessive condition in which there is abnormality of proteoglycan synthesis. Mutations in the carbohydrate sulphotransferase gene (CHST6) prevent normal sulfation of corneal keratan. Different immunophenotypes have been described depending on the presence of keratan sulfate in cornea and or serum. The deposition of abnormal proteoglycans leads to loss of corneal transparency and decreased vision...
March 28, 2018: Survey of Ophthalmology
https://www.readbyqxmd.com/read/29594793/sterile-keratitis-after-uneventful-corneal-collagen-cross-linking-in-a-patient-with-axenfeld-rieger-syndrome
#11
Betul Seher Uysal, Derya Yaman, Ozge Sarac, Emine Akcay, Nurullah Cagil
PURPOSE: To report on a keratoconus (KC) patient with Axenfeld-Rieger syndrome (ARS) who developed sterile keratitis after accelerated corneal collagen cross-linking (CXL). METHODS: An 18-year-old patient with ARS and KC who had previously undergone intrastromal ring segment implantation underwent accelerated CXL (9 mW/cm2  UVA intensity for 10 min). RESULTS: After uneventful surgery, the patient presented with severe photophobia, redness of the eye, and decreased vision 72 h following the procedure...
March 28, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29582259/corneal-densitometry-after-accelerated-corneal-collagen-cross-linking-in-progressive-keratoconus
#12
Myriam Böhm, Mehdi Shajari, Matthias Remy, Thomas Kohnen
PURPOSE: To analyze changes in corneal densitometry 3 months after accelerated corneal collagen cross-linking (CXL) measured with Scheimpflug tomography. METHODS: In this study we reviewed charts and anterior segment data of patients who had undergone accelerated pulsed epithelium-off CXL (30 mW/cm2 for 4 min, 8 min total radiation time) for treatment of progressive keratoconus in the Department of Ophthalmology, Goethe University, Frankfurt, Germany. Visual, topographic, pachymetric and densitometric data were extracted before surgery and at the 3-month follow-up...
March 26, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29564655/template-based-methodology-for-the-simulation-of-intracorneal-segment-ring-implantation-in-human-corneas
#13
REVIEW
Julio Flecha-Lescún, Begoña Calvo, Jesús Zurita, Miguel Ángel Ariza-Gracia
Keratoconus is an idiopathic, non-inflammatory and degenerative corneal disease characterised by a loss of the organisation in the corneal collagen fibrils. As a result, keratoconic corneas present a localised thinning and conical protrusion with irregular astigmatism and high myopia that worsen visual acuity. Intracorneal ring segments (ICRSs) are used in clinic to regularise the corneal surface and to prevent the disease from progressing. Unfortunately, the post-surgical effect of the ICRS is not explicitly accounted beforehand...
March 21, 2018: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29564409/objective-quantification-of-corneal-haziness-using-anterior-segment-optical-coherence-tomography
#14
Jeyanth Suresh Rose, Juliet Eldrina, Aarwin Joshua, S Amalan, Tunny Sebastian, Satheesh Solomon, Sanita Korah
Purpose: To quantify normal corneal transparency by anterior segment optical coherence tomography (AS-OCT) by measuring the average pixel intensity. To analyze the variation in the average pixel intensity in mild and severe grades of corneal opacities. Methods: This is an observational, cross-sectional study of 38 eyes from 19 patients with mild or severe grades of corneal opacities greater than 3 mm and a normal contralateral cornea. AS-OCT was performed centered on the opacity with a 3 mm cruciate protocol...
March 2018: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/29564359/femtosecond-laser-assisted-astigmatic-keratotomy-a-review
#15
REVIEW
John S M Chang
Background: Astigmatic keratotomy (AK) remains an accessible means to correct surgically induced or naturally occurring astigmatism. The advantages of femtosecond laser-assisted astigmatic keratotomy (FSAK) over conventional methods have been recognized recently. Main text: This review evaluates the efficacy, complications, and different methods of FSAK for correction of astigmatism in native eyes and those that underwent previous penetrating keratoplasty (PKP)...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29548900/visual-restoration-after-cataract-surgery-promotes-functional-and-structural-brain-recovery
#16
Haotian Lin, Li Zhang, Duoru Lin, Wan Chen, Yi Zhu, Chuan Chen, Kevin C Chan, Yizhi Liu, Weirong Chen
BACKGROUND: Visual function and brain function decline concurrently with aging. Notably, cataract patients often present with accelerated age-related decreases in brain function, but the underlying mechanisms are still unclear. Optical structures of the anterior segment of the eyes, such as the lens and cornea, can be readily reconstructed to improve refraction and vision quality. However, the effects of visual restoration on human brain function and structure remain largely unexplored...
March 7, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29543663/role-of-dendritic-cells-and-inflammatory-cells-in-herpetic-endotheliitis-analysis-using-in-vivo-confocal-microscopy
#17
Ting Wang, Muchen Dong, Yin Jiang, Shuting Wang, Weiyun Shi
PURPOSE: To observe the pathological changes in dendritic cells (DCs) and inflammatory cells in the corneal epithelium and endothelium using in vivo confocal microscopy during the management of herpetic endotheliitis. METHODS: A total of 110 eyes with herpetic endotheliitis were included. All patients were treated with antiviral agents combined with glucocorticoids. Changes in corneal edema were observed using slit-lamp microscopy and anterior segment optical coherence tomography...
March 14, 2018: Cornea
https://www.readbyqxmd.com/read/29506241/pitx2-deficiency-and-associated-human-disease-insights-from-the-zebrafish-model
#18
Kathryn E Hendee, Elena A Sorokina, Sanaa S Muheisen, Linda M Reis, Rebecca C Tyler, Vujica Markovic, Goran Cuturilo, Brian A Link, Elena V Semina
The PITX2 (paired-like homeodomain 2) gene encodes a bicoid-like homeodomain transcription factor linked with several human disorders. The main associated congenital phenotype is Axenfeld-Rieger syndrome, type 1, an autosomal dominant condition characterized by variable defects in the anterior segment of the eye, an increased risk of glaucoma, craniofacial dysmorphism and dental and umbilical anomalies; in addition to this, one report implicated PITX2 in ring dermoid of the cornea and a few others described cardiac phenotypes...
May 15, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29480245/anterior-segment-optical-coherence-tomography-for-evaluation-of-cornea-and-ocular-surface
#19
Mittanamalli S Sridhar, Raul Martin
Current corneal assessment technologies make the process of corneal evaluation extremely fast and simple. Several devices and technologies allow to explore and manage patients better. Optical coherence tomography (OCT) technology has evolved over the years, and hence a detailed evaluation of anterior segment (AS) structures such as cornea, conjunctiva, tear meniscus, anterior chamber, iris, and crystalline lens has been possible in a noncontact and safe procedure. The purpose of this special issue is to present and update in the evaluation of cornea and ocular surface, and this paper reviews a description of the AS-OCT, presenting the technology and common clinical uses of OCT in the management of diseases involving cornea and ocular surface to provide an updated information of the clinical recommendations of this technique in eye care practice...
March 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29461005/clinical-findings-and-normative-ocular-data-for-free-living-anna-s-calypte-anna-and-black-chinned-archilochus-alexandri-hummingbirds
#20
Bret A Moore, David J Maggs, Soohyun Kim, Monica J Motta, Ruta Bandivadekar, Lisa A Tell, Christopher J Murphy
OBJECTIVE: To estimate the prevalence of ocular disease and obtain normative ocular data for free-living hummingbirds. ANIMALS STUDIED: Two hundred and sixty-three free-living, adult Hummingbirds from coastal and inland central California were studied, including Anna's (Calypte anna, n = 186) and Black-chinned (Archilochus alexandri; n = 77) hummingbirds. PROCEDURES: Slit lamp biomicroscopy and indirect ophthalmoscopy were performed on all individuals...
February 20, 2018: Veterinary Ophthalmology
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