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https://www.readbyqxmd.com/read/29044990/transcriptome-analysis-for-uvb-induced-phototoxicity-in-mouse-retina
#1
Mi-Jin An, Chul-Hong Kim, Gyu-You Nam, Dae-Hyun Kim, Sangmyung Rhee, Sung-Jin Cho, Jung-Woong Kim
Throughout life, the human eye is continuously exposed to sunlight and artificial lighting. Ambient light exposure can lead to visual impairment and transient or permanent blindness. To mimic benign light stress conditions, Mus musculus eyes were exposed to low-energy UVB radiation, ensuring no severe morphological changes in the retinal structure post-exposure. We performed RNA-seq analysis to reveal the early transcriptional changes and key molecular pathways involved before the activation of the canonical cell death pathway...
October 17, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/29030302/mesenchymal-stem-cell-therapy-for-retro-corneal-membrane-a-clinical-challenge-in-full-thickness-transplantation-of-biosynthetic-corneal-equivalents
#2
Vijayalakshmi Rajendran, Magdalena Netuková, May Griffith, John V Forrester, Lucia Kuffová
Artificial corneas (keratoprostheses) and biosynthetic collagen-based corneal equivalents are surgical implants designed to ease the global burden of corneal blindness. However, keratoprostheses in many cases fail due to development of fibrous retro-corneal membranes (RCM). Fibrous membranes which develop in the anterior chamber after prosthesis implantation do so on a matrix of fibrin. This study investigated fibrin deposition and RCM formation after full-thickness collagen-based hydrogel implants and compared them with syngeneic and allogeneic corneal grafts in mice...
October 10, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29023521/factors-affecting-eye-drop-instillation-in-glaucoma-patients-with-visual-field-defect
#3
MULTICENTER STUDY
Tomoko Naito, Koji Namiguchi, Keiji Yoshikawa, Kazuhisa Miyamoto, Shiro Mizoue, Yoichi Kawashima, Atushi Shiraishi, Fumio Shiraga
BACKGROUND: To investigate the success rate of eye drop instillation in glaucoma patients with visual field defect as well as non-glaucoma volunteers. Factors that may affect the success rate of eye drop instillation were also evaluated. DESIGN: A prospective, observational study. PARTICIPANTS: Seventy-eight glaucoma patients and 85 non-glaucoma volunteers were recruited in this study. METHODS: Open angle glaucoma patients with visual field defect as well as non-glaucoma volunteers were asked to video record their procedures of eye drop instillation using a 5-mL plastic bottle of artificial tear solution...
2017: PloS One
https://www.readbyqxmd.com/read/29018761/using-stem-cell-biology-to-study-and-treat-ophthalmologic-and-oculoplastic-diseases
#4
REVIEW
Albert Y Wu, Michael G Daniel
With the rapid growth of the stem cell biology field, the prospect of regenerative medicine across multiple tissue types comes closer to reality. Several groundbreaking steps paved the way for applying stem cell biology to the several subfields within ophthalmology and oculoplastic surgery. These steps include the use of stem cell transplants as well as studies of various ophthalmologic pathologies at the molecular level. The necessity of stem cell transplant is readily apparent, having already been used for several studies such as artificial lacrimal gland design and eyelid reconstruction...
April 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/28992107/flow-in-the-anterior-chamber-of-the-eye-with-an-implanted-iris-fixated-artificial-lens
#5
Jennifer H Tweedy, Jan O Pralits, Rodolfo Repetto, Paolo Soleri
Flow in the aqueous humour that fills the anterior chamber of the eye occurs in response to the production and drainage of the aqueous humour, and also due to buoyancy effects produced by thermal gradients. Phakic intraocular lenses are manufactured lenses that are surgically inserted in the eyes of patients to correct refractive errors. Their presence has a dramatic effect on the circulation of the aqueous humour, resulting a very different flow in the anterior chamber, the effects of which have not been extensively investigated...
August 7, 2017: Mathematical Medicine and Biology: a Journal of the IMA
https://www.readbyqxmd.com/read/28979093/investigating-the-potential-benefits-of-a-new-artificial-tear-formulation-combining-two-polymers
#6
Peter A Simmons, Joseph G Vehige
PURPOSE: Artificial tear formulations typically contain a water-soluble polymer to enhance residence time, moisture retention, and binding to the mucin coat of the ocular surface, which facilitate corneal healing. This study investigated the potential advantages of combining carboxymethylcellulose (CMC) and hyaluronic acid (HA) polymers in a single formulation. MATERIALS AND METHODS: Individual CMC and HA solutions were prepared and tested for bulk viscosity in comparison to a solution that combined CMC and HA...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28973096/automated-grading-of-age-related-macular-degeneration-from-color-fundus-images-using-deep-convolutional-neural-networks
#7
Philippe M Burlina, Neil Joshi, Michael Pekala, Katia D Pacheco, David E Freund, Neil M Bressler
Importance: Age-related macular degeneration (AMD) affects millions of people throughout the world. The intermediate stage may go undetected, as it typically is asymptomatic. However, the preferred practice patterns for AMD recommend identifying individuals with this stage of the disease to educate how to monitor for the early detection of the choroidal neovascular stage before substantial vision loss has occurred and to consider dietary supplements that might reduce the risk of the disease progressing from the intermediate to the advanced stage...
September 28, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28956698/relevance-of-lipid-based-products-in-the-management-of-dry-eye-disease
#8
Jean-Sébastien Garrigue, Mourad Amrane, Marie-Odile Faure, Juha M Holopainen, Louis Tong
Components of the ocular surface synergistically contribute to maintaining and protecting a smooth refractive layer to facilitate the optimal transmission of light. At the air-water interface, the tear film lipid layer (TFLL), a mixture of lipids and proteins, plays a key role in tear surface tension and is important for the physiological hydration of the ocular surface and for ocular homeostasis. Alterations in tear fluid rheology, differences in lipid composition, or downregulation of specific tear proteins are found in most types of ocular surface disease, including dry eye disease (DED)...
November 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28953672/comparison-of-the-efficacy-between-topical-diquafosol-and-artificial-tears-in-the-treatment-of-dry-eye-following-cataract-surgery-a-meta-analysis-of-randomized-controlled-trials
#9
REVIEW
Xinyu Zhao, Song Xia, Youxin Chen
BACKGROUND: The prevalence of dry eye following cataract surgery was reported as high as 55.7%, this acute and iatrogenic disorder urgently required appropriate clinical management. The purpose of this study is to compare the efficacy of diquafosol sodium ophthalmic solution (DQS) and conventional artificial tears (AT) for the treatment of dry eye following cataract surgery. METHODS: The PubMed, Embase, and the Cochrane Central Register of Controlled Trials were searched from their earliest entries through June 2017 to obtain the studies, which evaluated the efficacy of DQS for patients with dry eye after cataract surgery...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28944192/intraocular-pressure-control-of-a-novel-glaucoma-drainage-device-in-vitro-and-in-vivo-studies
#10
Li-Jun Cui, Di-Chen Li, Jian Liu, Lei Zhang, Yao Xing
AIM: To evaluate the intraocular pressure (IOP) control of an artificial trabeculum drainage system (ATDS), a newly designed glaucoma drainage device, and postoperative complications in normal rabbit eyes. METHODS: Pressure drops in air and fluid of 30 ATDS were measured after being connected to a closed manometric system. Twenty of them were then chosen and implanted randomly into the eyes of 20 rabbits. Postoperative slit-lamp, gonioscopic examination and IOP measurements were recorded periodically...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28939118/dry-eye-disease-in-the-elderly-in-a-french-population-based-study-the-montrachet-study-maculopathy-optic-nerve-nutrition-neurovascular-and-heart-diseases-prevalence-and-associated-factors
#11
Arthur Ferrero, Seydou Alassane, Christine Binquet, Lionel Bretillon, Niyazi Acar, Louis Arnould, Aurore Muselier-Mathieu, Cécile Delcourt, Alain M Bron, Catherine Creuzot-Garcher
PURPOSE: To estimate the prevalence of dry eye disease (DED) in the elderly and to describe systemic and ocular factors associated with DED in a population-based study, the Montrachet (Maculopathy Optic Nerve nuTRition neurovAsCular and HEarT diseases) study. METHODS: Dry eye symptoms were evaluated using the Ocular Surface Disease Index (OSDI) questionnaire. A self-reported history of dry eye symptoms and artificial tear use were also recorded. Every participant underwent an ophthalmic evaluation, which included the Schirmer test without anesthesia (Schirmer I), tear film breakup time (TFBUT) measurement, and fluorescein corneal staining evaluation...
September 19, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28934372/antibacterial-effects-of-the-artificial-surface-of-nanoimprinted-moth-eye-film
#12
Kiyoshi Minoura, Miho Yamada, Takashi Mizoguchi, Toshihiro Kaneko, Kyoko Nishiyama, Mari Ozminskyj, Tetsuo Koshizuka, Ikuo Wada, Tatsuo Suzutani
The antibacterial effect of a nanostructured film, known as "moth-eye film," was investigated. The moth-eye film has artificially formed nano-pillars, consisting of hydrophilic resin with urethane acrylate and polyethylene glycol (PEG) derivatives, all over its surface that replicates a moth's eye. Experiments were performed to compare the moth-eye film with a flat-surfaced film produced from the same materials. The JIS Z2801 film-covering method revealed that the two films produced a decrease in Staphylococcus aureus and Esherichia coli titers of over 5 and 3 logs, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28932339/penetrating-keratoplasty-for-keratoconus-excimer-versus-femtosecond-laser-trephination
#13
Berthold Seitz, Achim Langenbucher, Tobias Hager, Edgar Janunts, Moatasem El-Husseiny, Nora Szentmáry
BACKGROUND: In case of keratoconus, rigid gas-permeable contact lenses as the correction method of first choice allow for a good visual acuity for quite some time. In a severe stage of the disease with major cone-shaped protrusion of the cornea, even specially designed keratoconus contact lenses are no more tolerated. In case of existing contraindications for intrastromal ring segments, corneal transplantation typically has a very good prognosis. METHODS: In case of advanced keratoconus - especially after corneal hydrops due to rupture of Descemet's membrane - penetrating keratoplasty (PKP) still is the surgical method of first choice...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28925742/visual-search-performance-in-patients-with-vision-impairment-a-systematic-review
#14
Cassia Senger, Maria Rita Rodrigues Alves Margarido, Carlos Gustavo De Moraes, Ligia Issa De Fendi, André Messias, Jayter Silva Paula
PURPOSE: Patients with visual impairment are constantly facing challenges to achieve an independent and productive life, which depends upon both a good visual discrimination and search capacities. Given that visual search is a critical skill for several daily tasks and could be used as an index of the overall visual function, we investigated the relationship between vision impairment and visual search performance. METHODS: A comprehensive search was undertaken using electronic PubMed, EMBASE, LILACS, and Cochrane databases from January 1980 to December 2016, applying the following terms: "visual search", "visual search performance", "visual impairment", "visual exploration", "visual field", "hemianopia", "search time", "vision lost", "visual loss", and "low vision"...
November 2017: Current Eye Research
https://www.readbyqxmd.com/read/28922696/does-air-gas-aesthesiometry-generate-a-true-mechanical-stimulus-for-corneal-sensitivity-measurement
#15
Daniela S Nosch, Heiko Pult, Julie Albon, Christine Purslow, Paul J Murphy
BACKGROUND: Belmonte Ocular Pain Meter (OPM) air jet aesthesiometry overcomes some of the limitations of the Cochet-Bonnet aesthesiometer. However, for true mechanical corneal sensitivity measurement, the airflow stimulus temperature of the aesthesiometer must equal ocular surface temperature (OST), to avoid additional response from temperature-sensitive nerves. The aim of this study was to determine: (A) the stimulus temperature inducing no or least change in OST; and (B) to evaluate if OST remains unchanged with different stimulus durations and airflow rates...
September 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28889981/visual-vestibular-conflict-detection-depends-on-fixation
#16
Isabelle T Garzorz, Paul R MacNeilage
Visual and vestibular signals are the primary sources of sensory information for self-motion. Conflict among these signals can be seriously debilitating, resulting in vertigo [1], inappropriate postural responses [2], and motion, simulator, or cyber sickness [3-8]. Despite this significance, the mechanisms mediating conflict detection are poorly understood. Here we model conflict detection simply as crossmodal discrimination with benchmark performance limited by variabilities of the signals being compared. In a series of psychophysical experiments conducted in a virtual reality motion simulator, we measure these variabilities and assess conflict detection relative to this benchmark...
September 25, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28878823/a-de-novo-complex-chromosome-rearrangement-associated-with-multisystematic-abnormalities-a-case-report
#17
Chan Tian, Dan Li, Ping Liu, Liping Jiao, Xuefeng Gao, Jie Qiao
BACKGROUND: Complex chromosomal rearrangements (CCRs) are constitutional structural rearrangements that involve three or more chromosomes or that have more than two breakpoints. CASE PRESENTATION: Here, we describe a four-way CCR involving chromosomes 4, 5, 6 and 8. The patient had mild multisystematic abnormalities during his development, including defects in his eyes and teeth, exomphalos and asthenozoospermia. His wife had two spontaneous abortions during the first trimester...
2017: Molecular Cytogenetics
https://www.readbyqxmd.com/read/28877133/tear-dysfunction-syndrome-after-burn
#18
Jeong Won Seo, Hyun Sun Jeon, Jae Ryong Han
The objective of this study was to evaluate tear dysfunction of burn patients objectively. We retrospectively reviewed medical records of patients who had been examined within 1 week after burn injury. Visual acuity, intraocular pressure, cilia burned state, tear film break-up time (TBUT), and fluorescein corneal staining were evaluated. Sixty-four eyes of 32 patients (man 27, female 5) were included. Mean age was 44.41 ± 12.76 years old. Mean best corrected visual acuity was logMAR 0.04 ± 0.08, mean intraocular pressure was 13...
August 31, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28863116/an-aesthetic-orbicularis-oculi-myectomy-technique-for-blepharospasm-use-of-topical-5-fluorouracil-and-fibrin-sealant
#19
Krista J Stewart, Shannon S Joseph, Raymond S Douglas
PURPOSE: To describe a modified technique of orbicularis oculi myectomy for refractory blepharospasm. This technique includes removal of orbicularis muscle, reformation of the eyelid crease and pretarsal platform using fibrin sealant (Tisseel), and topical 5-fluorouracil to reduce scar formation and improve aesthetic outcome. METHODS: Retrospective chart review of 7 patients who underwent bilateral orbicularis oculi myectomy with our technique from 2013 to 2016...
August 24, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28855664/oral-mucosal-epithelial-cells-grown-on-porous-silicon-membrane-for-transfer-to-the-rat-eye
#20
Yazad D Irani, Sonja Klebe, Steven J P McInnes, Marek Jasieniak, Nicolas H Voelcker, Keryn A Williams
Dysfunction of limbal stem cells or their niche can result in painful, potentially sight-threatening ocular surface disease. We examined the utility of surface-modified porous-silicon (pSi) membranes as a scaffold for the transfer of oral mucosal cells to the eye. Male-origin rat oral mucosal epithelial cells were grown on pSi coated with collagen-IV and vitronectin, and characterised by immunocytochemistry. Scaffolds bearing cells were implanted into normal female rats, close to the limbus, for 8 weeks. Histology, immunohistochemistry and a multiplex nested PCR for sry were performed to detect transplanted cells...
August 30, 2017: Scientific Reports
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