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https://www.readbyqxmd.com/read/28445703/sensitivity-and-specificity-of-laser-scanning-in-vivo-confocal-microscopy-for-filamentous-fungal-keratitis-role-of-observer-experience
#1
Ahmad Kheirkhah, Zeba A Syed, Vannarut Satitpitakul, Sunali Goyal, Rodrigo Müller, Elmer Y Tu, Reza Dana
PURPOSE: To determine sensitivity and specificity of laser-scanning in vivo confocal microscopy (LS-IVCM) for detection of filamentous fungi in patients with microbial keratitis and to evaluate the effect of observer's imaging experience on these parameters. DESIGN: Retrospective, reliability study METHODS: This study included 21 patients with filamentous fungal keratitis and 24 patients with bacterial keratitis (as controls). The etiology of infection was confirmed based on the response to specific therapy regardless of culture results...
April 23, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28410280/long-term-impacts-of-orthokeratology-treatment-on-sub-basal-nerve-plexus-and-corneal-sensitivity-responses-and-their-reversibility
#2
María Nombela-Palomo, Gema Felipe-Marquez, Miguel Angel Teus, Jose Luis Hernandez-Verdejo, Amelia Nieto-Bona
PURPOSE: To examine the effects of one year of overnight orthokeratology (OK) treatment on the sub-basal nerve plexus (SBNP) and corneal sensitivity and to assess the reversibility of these effects one month after treatment interruption. METHODS: Thirty-two subjects with low-moderate myopia underwent OK treatment for one year. Fifteen non-contact lens wearers served as controls. At the time points baseline, one year of treatment, and one month after removing the OK lenses, two tests were conducted: corneal sensitivity (Cochet-Bonnet esthesiometer) and SBNP imaging by in vivo confocal microscopy...
April 13, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28399039/characterization-of-corneal-involvement-in-eyes-with-mucous-membrane-pemphigoid-by-in-vivo-confocal-microscopy
#3
Tudor C Tepelus, Jianyan Huang, SriniVas R Sadda, Olivia L Lee
PURPOSE: To describe the morphological features of the corneal epithelial layers, subbasal nerve plexus, stroma, and endothelium in patients with mucous membrane pemphigoid (MMP) as shown by in vivo confocal microscopy (IVCM). METHODS: Central corneal images were captured from 10 healthy age-matched control eyes and 30 eyes with clinically diagnosed MMP by in vivo laser scanning confocal microscopy (HRT III RCM). Morphological changes of the corneal epithelial layers, stroma, and endothelium, characteristics of corneal nerves, and presence of inflammatory dendritic cells (DCs) were evaluated...
April 10, 2017: Cornea
https://www.readbyqxmd.com/read/28393028/analysis-of-corneal-morphologic-and-pathologic-changes-in-early-stage-congenital-aniridic-keratopathy
#4
Juan Du, Rong-Qiang Liu, Lei Ye, Zhi-Hui Li, Feng-Tu Zhao, Nan Jiang, Lin-Hong Ye, Yi Shao
AIM: To determine typical corneal changes of congenital aniridic keratopathy (CAK) using corneal topography and confocal systems, and to identify characteristics that might assist in early diagnosis. METHODS: Patients with CAK and healthy control subjects underwent detailed ophthalmic examinations including axial length, corneal thickness, tear film condition, corneal topography, and laser-scanning in vivo confocal microscopy (IVCM). RESULTS: In early stage aniridic keratopathy, Schirmer I test (SIT), break-up time (BUT), mean keratometry (mean K) and simulated keratometry (sim K) were reduced relative to controls (P<0...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28378047/-confocal-microscope-examination-of-the-corneal-nerve-plexus-as-biomarker-for-systemic-diseases-view-from-the-corneal-nerve-plexus-on-diabetes-mellitus-disease
#5
S Baltrusch
It is estimated that approximately 50% of patients with diabetes mellitus suffer from polyneuropathy, which is frequently diagnosed too late. Consequently, the question arises whether imaging procedures of the eye, namely optical coherence tomography of the retina and confocal microscopy of the cornea are suitable for the diagnostics and follow-up control of neurodegenerative changes in patients with diabetes mellitus. De Clerck and co-workers could demonstrate this by a systematic review of studies. Of these studies 11 were further evaluated with respect to corneal confocal microscopy...
April 4, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28366375/measuring-the-depth-of-crosslinking-demarcation-line-in%C3%A2-vivo-comparison-of-methods-and-devices
#6
Andreas Thorsrud, Gunhild F Sandvik, Anne M Hagem, Liv Drolsum
PURPOSE: To assess the interrelationship of different methods of measuring the demarcation line depth after corneal collagen crosslinking (CXL). SETTING: University eye clinic, Oslo, Norway. DESIGN: Prospective case series. METHODS: Eyes having CXL for progressive keratoconus were evaluated 1 month after CXL by in vitro confocal microscopy (IVCM), optical coherence tomography (OCT), and Scheimpflug imaging. When applying IVCM, the depth of the CXL demarcation line was measured with 2 methods; that is, IVCM keratocyte disappearance and IVCM intensity increase...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28346276/comparison-of-noncontact-specular-and-confocal-microscopy-for-evaluation-of-corneal-endothelium
#7
Jianyan Huang, Jyotsna Maram, Tudor C Tepelus, Srinivas R Sadda, Vikas Chopra, Olivia L Lee
PURPOSE: To compare endothelial cell analysis obtained by noncontact specular and confocal microscopy, using the Konan NSP-9900 and Nidek ConfoScan4 systems, respectively. METHODS: Three groups including 70 healthy eyes, 49 eyes with Fuchs endothelial corneal dystrophy (FECD), and 78 eyes with glaucoma were examined with both the Konan NSP-9900 specular microscope and the Nidek ConfocScan4 confocal microscope. Certified graders at the Doheny Image Reading Center compared corneal endothelial images from both instruments side by side to assess image quality...
March 24, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28337063/a-novel-mutation-and-in-vivo-confocal-microscopic-findings-in-fabry-disease
#8
Cumali Degirmenci, Suzan Guven Yilmaz, Huseyin Onay, Melis Palamar, Sema Kalkan Ucar, Meral Kayikcioglu, Mahmut Coker
Fabry disease is a hereditary, X-linked lysosomal storage disease due to a deficiency of the alpha galactosidase A enzyme. Globotriaosylceramide accumulates in tissues and results in multiorgan dysfunction. The most common ocular finding in Fabry disease is cornea verticillata. Increase in conjunctival vascular tortuosity, and cataract may also be seen. Herein, we demonstrate the in vivo confocal microscopic findings of a genetically proven Fabry disease patient with a novel hemizygous R112L mutation in GLA gene...
January 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28316191/-in-vivo-confocal-microscopic-observation-of-corneal-changes-in-patients-with-chronic-stevens-johnson-syndrome-or-toxic-epidermal-necrolysis
#9
T T Gao, Y Li, J Liu, Q Long
Objective: To describe corneal alterations visible on in vivo confocal microscopy in patients with debilitating ocular sequelae caused by Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN). Methods: Twenty-two eyes of 11 consecutive patients suffering from chronic SJS or TEN were studied using slit lamp and in vivo confocal microscopy in the Ophthalmology Outpatient Department of Peking Union Medical College Hospital from March 2014 to April 2015. Results: Dry eye with meibomian gland dysfunction (19 eyes of 10 patients, 86...
March 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28302098/in-vivo-confocal-microscopy-of-pre-descemet-corneal-dystrophy-associated-with-x-linked-ichthyosis-a-case-report
#10
Hui Shi, Xiao-Feng Qi, Tao-Tao Liu, Qian Hao, Xiao-Hong Li, Ling-Ling Liang, Yi-Miao Wang, Zhi-Hua Cui
BACKGROUND: Pre-Descemet corneal dystrophy (PDCD) is characterized by the presence of numerous, tiny, polymorphic opacities immediately anterior to Descemet membrane, which is a rare form of corneal stromal dystrophy and hard to be diagnosed. In vivo confocal microscopy (IVCM) is a useful tool to examine the minimal lesions of the cornea at the cellular level. In this article, we report a rare case of PDCD associated with X-linked ichthyosis and evaluate IVCM findings. CASE PRESENTATION: We present a 34-year-old male Chinese patient with PDCD associated with X-linked ichthyosis...
March 16, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28291202/-comparative-analysis-of-the-value-of-information-provided-by-anterior-segment-optical-coherence-tomography-and-confocal-laser-scanning-microscopy-for-identifying-the-palisades-of-vogt-in-normal-limbus
#11
N P Pashtaev, N A Pozdeeva, A A Voskresenskaya, B V Gagloev, A A Shipunov
AIM: to conduct a comparative analysis of the value of information provided by anterior segment optical coherence tomography (AS-OCT) and in vivo confocal laser scanning microscopy (CLSM) for identifying the palisades of Vogt (POV) in normal limbus. MATERIAL AND METHODS: POV were studied in 15 healthy participants (30 eyes) without any anterior segment disease. Two examination methods were used: AS-OCT En Face imaging (RTVue XR Avanti, 3D Cornea protocol) and CLSM (HRT3)...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28283769/-in-vivo-imaging-of-the-corneal-nerve-plexus-from-single-image-to-large-scale-map
#12
B Köhler, S Allgeier, A Bartschat, R F Guthoff, S Bohn, K-M Reichert, O Stachs, K Winter, R Mikut
The sub-basal nerve plexus (SNP) of the cornea provides the possibility of in vivo and non-invasive examination of peripheral nerve structures by corneal confocal microscopy (CCM). Thus morphological alterations of the SNP can be directly detected and quantified. A single CCM image is insufficient for a well-founded diagnosis because of the inhomogeneous distribution of the nerve fibers; therefore, there is a demand for techniques for large area imaging of the SNP. This article provides an overview of published approaches to the problem...
March 10, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28282739/in-vivo-confocal-microscopic-characteristics-of-crystalline-keratopathy-in-patients-with-sclerokeratitis
#13
Noopur Gupta, Anita Ganger, Shibal Bhartiya, Meena Verma, Radhika Tandon
PURPOSE: To report in vivo confocal features in a clinical case series of patients with sclerokeratitis presenting as crystalline keratopathy. METHODS: Five cases of crystalline keratopathy following sclerokeratitis are described. Confocal microscopic images of the cornea were captured in all cases to confirm the diagnosis by evaluating the morphology of the crystals. RESULTS: Unilateral and non-progressive peripheral crystalline keratopathy manifested after previous episodes of sclerokeratitis in the involved eye...
February 22, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28268563/automated-morphometric-description-of-human-corneal-endothelium-from-in-vivo-specular-and-confocal-microscopy
#14
F Scarpa, A Ruggeri
Corneal images acquired by in-vivo specular and confocal microscopy provide clinical information on the cornea endothelium health state. Indeed, the normal hexagonal shape of endothelial cells is usually affected by age and pathologies. At present, the analysis is based on manual or semi-automatic methods and the segmentation of a large number of endothelial cells is required for a meaningful estimation of the clinical parameters. We propose an automated method that detects the centers of endothelial cells by convolving the original image with customized two-dimensional kernels, derives a structure made by connected vertices from the recognized centers using the Euclidean distance, and fine-tunes the derived structure through a genetic algorithm, which combines information about the typical regularity of endothelial cells shape with the pixels intensity of the actual image...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268149/corneal-nerve-microstructure-in-parkinson-s-disease
#15
Stuti L Misra, Hannah M Kersten, Richard H Roxburgh, Helen V Danesh-Meyer, Charles N J McGhee
Ocular surface changes and blink abnormalities are well-established in Parkinson's disease. Blink rate may be influenced by corneal sub-basal nerve density, however, this relationship has not yet been investigated in Parkinson's disease. This case-control study examined the ocular surface in patients with moderately severe Parkinson's disease, including confocal microscopy of the cornea. Fifteen patients with moderately severe Parkinson's disease (modified Hoehn and Yahr grade 3 or 4) and fifteen control participants were recruited...
March 3, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28264131/ex-vivo-study-of-transepithelial-corneal-cross-linking
#16
Andrea Cruzat, Anita N Shukla, Samer N Arafat, Saleh Alageel, Clara Colon, James Chodosh, Joseph B Ciolino
PURPOSE: To perform in vitro assessment of different techniques of transepithelial corneal cross-linking (CXL) and to compare the results to deepithelialized CXL. METHODS: Transepithelial CXL was performed after pre-treatment with or without penetration enhancers (gum cellulose, 0.44% sodium chloride, and 0.01% benzalkonium chloride) for 15 or 60 minutes. Deepithelialized corneas underwent CXL after pretreatment with riboflavin for 15 minutes, according to the Dresden protocol...
March 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28258973/rapid-automated-mosaicking-of-the-human-corneal-subbasal-nerve-plexus
#17
Yash J Vaishnav, Stuart A Rucker, Keshav Saharia, Nancy A McNamara
Corneal confocal microscopy (CCM) is an in vivo technique used to study corneal nerve morphology. The largest proportion of nerves innervating the cornea lie within the subbasal nerve plexus, where their morphology is altered by refractive surgery, diabetes and dry eye. The main limitations to clinical use of CCM as a diagnostic tool are the small field of view of CCM images and the lengthy time needed to quantify nerves in collected images. Here, we present a novel, rapid, fully automated technique to mosaic individual CCM images into wide-field maps of corneal nerves...
March 4, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28251081/effects-of-contact-lens-wearing-on-keratoconus-a-confocal-microscopy-observation
#18
Somnath Ghosh, Haliza A Mutalib, Sharanjeet-Kaur, Rituparna Ghoshal, Shamala Retnasabapathy
AIM: To evaluate the corneal cell morphology of new keratoconus patients wearing two different types of rigid gas-permeable (RGP) contact lenses for 1y. METHODS: Thirty nine eyes of 39 new keratoconus patients were selected and randomly fitted with two types of RGP contact lenses. Group 1 had 21 eyes with regular rigid gas-permeable (RRGP) contact lens and rest 18 eyes were in group 2 with specially designed rigid gas-permeable (SRGP) contact lens. Corneal cell morphology was evaluated using a slit scanning confocal microscope at no-lens wear and after 1y of contact lens wearing...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28226740/automated-morphometric-description-of-human-corneal-endothelium-from-in-vivo-specular-and-confocal-microscopy
#19
F Scarpa, A Ruggeri, F Scarpa, A Ruggeri, A Ruggeri, F Scarpa
Corneal images acquired by in-vivo specular and confocal microscopy provide clinical information on the cornea endothelium health state. Indeed, the normal hexagonal shape of endothelial cells is usually affected by age and pathologies. At present, the analysis is based on manual or semi-automatic methods and the segmentation of a large number of endothelial cells is required for a meaningful estimation of the clinical parameters. We propose an automated method that detects the centers of endothelial cells by convolving the original image with customized two-dimensional kernels, derives a structure made by connected vertices from the recognized centers using the Euclidean distance, and fine-tunes the derived structure through a genetic algorithm, which combines information about the typical regularity of endothelial cells shape with the pixels intensity of the actual image...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28167204/changes-in-corneal-sub-basal-nerve-morphology-and-sensitivity-during-orthokeratology-recovery-of-change
#20
Edward Lum, Blanka Golebiowski, Helen A Swarbrick
PURPOSE: To investigate the recovery of changes in corneal nerve morphology and sensitivity in orthokeratology (OK) following lens wear discontinuation, over a 3-month period. METHODS: Sixteen myopic subjects who wore OK lenses during sleep for 3 months discontinued lens wear for 3 months. Corneal nerve morphology and sensitivity were assessed 3 h after waking on the right eye only at the pre-lens wear baseline and after lens wear discontinuation. Corneal nerve fiber density (NFD) and global nerve fiber orientation (GNFO) were assessed by sampling a 1 mm(2) area of the sub-basal nerve plexus at the corneal apex and temporal mid-periphery using in vivo confocal microscopy...
February 3, 2017: Ocular Surface
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