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https://www.readbyqxmd.com/read/28528121/determinants-of-ocular-pain-severity-in-patients-with-dry-eye-disease
#1
Vannarut Satitpitakul, Ahmad Kheirkhah, Alja Crnej, Pedram Hamrah, Reza Dana
PURPOSE: To quantify the severity of ocular pain in patients with dry eye disease (DED) and evaluate factors associated with pain severity. DESIGN: Cross-sectional study. METHODS: Eighty-four patients with DED were asked to score their severity level of ocular pain using a 10-point scale, with 10 indicating the most severe pain. All patients also had a comprehensive ophthalmic assessment including a detailed history, Ocular Surface Disease Index (OSDI) questionnaire, and ocular surface examination...
May 17, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28525561/decade-long-profile-of-imaging-biomarker-use-in-ophthalmic-clinical-trials
#2
Edoardo Villani, Domenico Massaro, Matteo Scaramuzzi, Pedram Hamrah, Felipe A Medeiros, Paolo Nucci
Purpose: The purpose of this study was to investigate the use of imaging biomarkers in published clinical trials (CTs) in ophthalmology and its eventual changes during the past 10 years. Methods: We sampled from published CTs in the fields of cornea, retina, and glaucoma between 2005-2006 and 2015-2016. Data collected included year of publication, phase, subspecialty, location, compliance with Consolidated Standards for Reporting Trials, impact factor, presence and use of imaging biomarkers (diagnostic, prognostic and predictive; primary and secondary surrogate endpoints), and use of centralized reading centers...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28514253/widespread-effects-of-clinically-unilateral-focal-nerve-injuries
#3
Pedram Hamrah, Afsun Sahin, Anne Louise Oaklander
No abstract text is available yet for this article.
June 2017: Pain
https://www.readbyqxmd.com/read/28481835/patients-perceived-treatment-effectiveness-in-dry-eye-disease
#4
Ahmad Kheirkhah, Alja Crnej, Ai Ren, Andrew Mullins, Vannarut Satitpitakul, Pedram Hamrah, Debra Schaumberg, Reza Dana
PURPOSE: Patients' perceptions of the effectiveness of a treatment, or perceived treatment effectiveness (PTE), play an important role in medicine. This study aimed to evaluate patients' PTE in dry eye disease (DED) and investigate factors contributing to these patients' perceptions. METHODS: This cross-sectional study included 66 patients with DED. At enrollment, all patients had comprehensive ophthalmic assessment. In addition, to evaluate the patient's PTE, they were asked to use a 10-point scale ranging from "strongly disagree (score 1)" to "strongly agree (score 10)" to score their views on whether their DED treatments had been effective...
May 3, 2017: Cornea
https://www.readbyqxmd.com/read/28348600/delivery-of-bone-marrow-derived-mesenchymal-stem-cells-improves-tear-production-in-a-mouse-model-of-sj%C3%A3-gren-s-syndrome
#5
Hema S Aluri, Mahta Samizadeh, Maria C Edman, Dillon R Hawley, Helene L Armaos, Srikanth R Janga, Zhen Meng, Victor G Sendra, Pedram Hamrah, Claire L Kublin, Sarah F Hamm-Alvarez, Driss Zoukhri
The purpose of the present study was to test the potential of mouse bone marrow-derived mesenchymal stem cells (BD-MSCs) in improving tear production in a mouse model of Sjögren's syndrome dry eye and to investigate the underlying mechanisms involved. NOD mice (n = 20) were randomized to receive i.p. injection of sterile phosphate buffered saline (PBS, control) or murine BD-MSCs (1 × 10(6) cells). Tears production was measured at baseline and once a week after treatment using phenol red impregnated threads...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28288269/topical-cryopreserved-amniotic-membrane-and-umbilical-cord-eye-drops-promote-re-epithelialization-in-a-murine-corneal-abrasion-model
#6
Sean Tighe, Hamid-Reza Moein, Lorraine Chua, Anny Cheng, Pedram Hamrah, Scheffer C G Tseng
Purpose: To evaluate morselized amniotic membrane and umbilical cord (AMUC) eye drops in promoting corneal re-epithelialization. Methods: Following a 2-mm diameter central epithelial wound in one eye of 48 normal C57BL/6 mouse corneas, 10 μL of saline with (n = 24) or without (n = 24) AMUC was applied three times a day for 6 days. The corneal epithelial defect was measured using 0.1% fluorescein, while corneal epithelial regularity was measured by assessment of a reflected light off the corneal surface...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28060067/patients-with-dry-eye-disease-and-low-subbasal-nerve-density-are-at-high-risk-for-accelerated-corneal-endothelial-cell-loss
#7
Ahmad Kheirkhah, Vannarut Satitpitakul, Pedram Hamrah, Reza Dana
PURPOSE: To evaluate changes in corneal endothelial cell density over time in patients with dry eye disease (DED) and to correlate endothelial cell loss with corneal subbasal nerve density. METHODS: This retrospective study included 40 eyes of 20 patients with DED. Laser in vivo confocal microscopy had been performed in the central cornea of both eyes at an initial visit and repeated after a mean follow-up of 33.2 ± 10.2 months. The densities of corneal endothelial cells and subbasal nerves were measured in both visits and compared with 13 eyes of 13 normal age-matched controls...
February 2017: Cornea
https://www.readbyqxmd.com/read/27890620/drug-induced-corneal-epithelial-changes
#8
REVIEW
Michael B Raizman, Pedram Hamrah, Edward J Holland, Terry Kim, Francis S Mah, Christopher J Rapuano, Roger G Ulrich
Drugs across many pharmacologic classes induce corneal epithelial changes. Many of these drugs have cationic amphiphilic structures, with a hydrophobic ring and hydrophilic cationic amine side chain that allow them to cross cell membranes. These drugs lead to intracellular phospholipid accumulation, often manifested in the cornea by vortex keratopathy, with no effect on visual acuity and few ocular symptoms. Other drugs, notably antineoplastic agents, produce a fine diffuse corneal haze, sometimes accompanied by decreased vision that can be dose limiting...
May 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/27816571/corneal-nerve-and-epithelial-cell-alterations-in-corneal-allodynia-an-in%C3%A2-vivo-confocal-microscopy-case-series
#9
Pedram Hamrah, Yureeda Qazi, Bashar Shahatit, Mohammad H Dastjerdi, Deborah Pavan-Langston, Deborah S Jacobs, Perry Rosenthal
PURPOSE: To investigate morphological changes of the corneal epithelium and subbasal nerves in patients with corneal allodynia using in vivo confocal microscopy (IVCM). DESIGN: Case-control study of patients with corneal allodynia and healthy controls. METHODS: Ten eyes of six patients were diagnosed with corneal allodynia at a single center and compared to fifteen healthy eyes. IVCM of the central cornea was performed on all subjects and controls...
January 2017: Ocular Surface
https://www.readbyqxmd.com/read/27811567/patients-with-dry-eye-disease-and-low-subbasal-nerve-density-are-at-high-risk-for-accelerated-corneal-endothelial-cell-loss
#10
Ahmad Kheirkhah, Vannarut Satitpitakul, Pedram Hamrah, Reza Dana
PURPOSE: To evaluate changes in corneal endothelial cell density over time in patients with dry eye disease (DED) and to correlate endothelial cell loss with corneal subbasal nerve density. METHODS: This retrospective study included 40 eyes of 20 patients with DED. Laser in vivo confocal microscopy had been performed in the central cornea of both eyes at an initial visit and repeated after a mean follow-up of 33.2 ± 10.2 months. The densities of corneal endothelial cells and subbasal nerves were measured in both visits and compared with 13 eyes of 13 normal age-matched controls...
November 2, 2016: Cornea
https://www.readbyqxmd.com/read/27811337/patients-with-multiple-sclerosis-demonstrate-reduced-subbasal-corneal-nerve-fibre-density
#11
Janine Mikolajczak, Hanna Zimmermann, Ahmad Kheirkhah, Ella Maria Kadas, Timm Oberwahrenbrock, Rodrigo Muller, Aiai Ren, Joseph Kuchling, Holger Dietze, Harald Prüss, Friedemann Paul, Pedram Hamrah, Alexander U Brandt
BACKGROUND: Many studies in multiple sclerosis (MS) have investigated the retina. Little, however, is known about the effect of MS on the cornea, which is innervated by the trigeminal nerve. It is the site of neural-immune interaction with local dendritic cells reacting in response to environmental stimuli. OBJECTIVE: This study aims to investigate the effect of MS on corneal nerve fibres and dendritic cells in the subbasal nerve plexus using in vivo confocal microscopy (IVCM)...
November 1, 2016: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/27772647/cystic-compound-melanocytic-nevus-in-a-pediatric-patient
#12
Catherine S Choi, Pedram Hamrah, Nora Laver
No abstract text is available yet for this article.
November 2016: Ophthalmology
https://www.readbyqxmd.com/read/27771327/in%C3%A2-vivo-confocal-microscopy-of-corneal-nerves-in-health-and-disease
#13
REVIEW
Andrea Cruzat, Yureeda Qazi, Pedram Hamrah
In vivo confocal microscopy (IVCM) is becoming an indispensable tool for studying corneal physiology and disease. Enabling the dissection of corneal architecture at a cellular level, this technique offers fast and noninvasive in vivo imaging of the cornea with images comparable to those of ex vivo histochemical techniques. Corneal nerves bear substantial relevance to clinicians and scientists alike, given their pivotal roles in regulation of corneal sensation, maintenance of epithelial integrity, as well as proliferation and promotion of wound healing...
January 2017: Ocular Surface
https://www.readbyqxmd.com/read/27631352/translational-immunoimaging-and-neuroimaging-demonstrate-corneal-neuroimmune-crosstalk
#14
REVIEW
Pedram Hamrah, Yashar Seyed-Razavi, Takefumi Yamaguchi
Corneal immunoimaging and neuroimaging approaches facilitate in vivo analyses of the cornea, including high-resolution imaging of corneal immune cells and nerves. This approach facilitates the analyses of underlying immune and nerve alterations not detected by clinical slit-lamp examination alone. In this review, we describe recent work performed in our translational ocular immunology center with a focus on "bench-to-bedside" and "bedside-to-bench" research. The ability to visualize dendritiform immune cells (DCs) in patients with laser in vivo confocal microscopy (IVCM), recently discovered in the central murine cornea, has allowed us to demonstrate their utility as a potential surrogate biomarker for inflammatory ocular surface diseases...
November 2016: Cornea
https://www.readbyqxmd.com/read/27617877/bilateral-alterations-in-corneal-nerves-dendritic-cells-and-tear-cytokine-levels-in-ocular-surface-disease
#15
REVIEW
Takefumi Yamaguchi, Pedram Hamrah, Jun Shimazaki
This review summarizes the recent literature regarding corneal imaging in human subjects using in vivo confocal microscopy. It also covers the recent literature on corneal immune cells, nerves, and tear cytokine levels in ocular surface diseases as well as corneal immune privilege. The significance of interactions between corneal immune cells and nerves in health, neurotrophic keratopathy, and infectious keratitis is discussed. Furthermore, bilateral alterations of immune cells and nerves in clinically unilateral corneal diseases and the link to changes of tear cytokines or neuropeptide levels in contralateral eyes are described...
November 2016: Cornea
https://www.readbyqxmd.com/read/27513904/acquired-corneal-neuropathy-and-photoallodynia-associated-with-malposition-of-an-ex-press-shunt
#16
Faith A Birnbaum, Pedram Hamrah, Deborah S Jacobs, Brian J Song
PURPOSE: Corneal neuropathy is a recently described disease process that is not well understood and is likely underdiagnosed as a result. This is the first reported case of an acquired corneal neuropathy associated with malposition of an Ex-PRESS shunt. METHODS: A single case report. RESULTS: We report the case of a 50-year-old man with a history of multiple procedures for glaucoma who subsequently developed photoallodynia and corneal neuropathy in association with malposition of an Ex-PRESS shunt in the peripheral cornea...
January 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/27431440/erratum-pathological-lymphangiogenesis-is-modulated-by-galectin-8-dependent-crosstalk-between-podoplanin-and-integrin-associated-vegfr-3
#17
Wei-Sheng Chen, Zhiyi Cao, Satoshi Sugaya, Maria J Lopez, Victor G Sendra, Nora Laver, Hakon Leffler, Ulf J Nilsson, Jianxin Fu, Jianhua Song, Lijun Xia, Pedram Hamrah, Noorjahan Panjwani
No abstract text is available yet for this article.
2016: Nature Communications
https://www.readbyqxmd.com/read/27136674/a-fully-automated-tortuosity-quantification-system-with-application-to-corneal-nerve-fibres-in-confocal-microscopy-images
#18
Roberto Annunziata, Ahmad Kheirkhah, Shruti Aggarwal, Pedram Hamrah, Emanuele Trucco
Recent clinical research has highlighted important links between a number of diseases and the tortuosity of curvilinear anatomical structures like corneal nerve fibres, suggesting that tortuosity changes might detect early stages of specific conditions. Currently, clinical studies are mainly based on subjective, visual assessment, with limited repeatability and inter-observer agreement. To address these problems, we propose a fully automated framework for image-level tortuosity estimation, consisting of a hybrid segmentation method and a highly adaptable, definition-free tortuosity estimation algorithm...
August 2016: Medical Image Analysis
https://www.readbyqxmd.com/read/27089999/validity-and-reliability-of-a-novel-ocular-pain-assessment-survey-opas-in-quantifying-and-monitoring-corneal-and-ocular-surface-pain
#19
Yureeda Qazi, Shelley Hurwitz, Sarosh Khan, Ula V Jurkunas, Reza Dana, Pedram Hamrah
PURPOSE: To validate the Ocular Pain Assessment Survey (OPAS), specifically designed to measure ocular pain and quality of life for use by eye care practitioners and researchers. DESIGN: A single-center cohort study was conducted among patients with and without corneal and ocular surface pain at initial and follow-up visits over a 6-month period. The content of the OPAS was guided by literature review, a body of experts, and incorporating conceptual frameworks from existing pain questionnaires...
July 2016: Ophthalmology
https://www.readbyqxmd.com/read/27086024/a-clinical-trial-comparing-the-safety-and-efficacy-of-topical-tacrolimus-versus-methylprednisolone-in-ocular-graft-versus-host-disease
#20
Tulio B Abud, Francisco Amparo, Ujwala S Saboo, Antonio Di Zazzo, Thomas H Dohlman, Joseph B Ciolino, Pedram Hamrah, Reza Dana
PURPOSE: To evaluate the safety and efficacy of topical tacrolimus 0.05% versus topical methylprednisolone 0.5% in patients with ocular graft-versus-host disease (GVHD). DESIGN: Phase 1/2 prospective, randomized, double-masked clinical trial. PARTICIPANTS: Eighty eyes of 40 patients diagnosed with chronic ocular GVHD were enrolled. METHODS: Forty patients with ocular GVHD were randomized; 24 patients were treated with topical tacrolimus 0...
July 2016: Ophthalmology
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