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https://www.readbyqxmd.com/read/28720436/direct-measurement-of-pressure-independent-aqueous-humour-flow-using-iperfusion
#1
Michael Madekurozwa, Ester Reina-Torres, Darryl R Overby, Joseph M Sherwood
Reduction of intraocular pressure is the sole therapeutic target for glaucoma. Intraocular pressure is determined by the dynamics of aqueous humour secretion and outflow, which comprise several pressure-dependent and pressure-independent mechanisms. Accurately quantifying the components of aqueous humour dynamics is essential in understanding the pathology of glaucoma and the development of new treatments. To better characterise aqueous humour dynamics, we propose a method to directly measure pressure-independent aqueous humour flow...
July 15, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28718904/autologous-serum-eye-drops-and-enhanced-epithelial-healing-time-after-photorefractive-keratectomy
#2
Hanife Tuba Akcam, Metin Unlu, Emine Esra Karaca, Hulya Yazici, Bahri Aydin, Ahmet Murad Hondur
BACKGROUND: The aim of the study is to test whether use of autologous serum eye-drops can provide earlier epithelial healing following the application of photorefractive keratectomy. METHOD: Sixty patients (60 eyes) underwent photorefractive keratectomy for myopia. Thirty eyes received autologous serum drops (Study group) while 30 eyes received conventional artificial tears (Control group) after photorefractive keratectomy. An 8 mm epithelial opening was prepared with the application of 18 per cent alcohol for 20 seconds...
July 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28714189/esthesiometric-evaluation-of-corneal-analgesia-after-topical-application-of-1-morphine-sulfate-in-normal-horses
#3
Emma Gordon, Christy Sandquist, Christopher K Cebra, Jerry Heidel, Keith Poulsen, John W Schlipf
OBJECTIVE: To evaluate whether topical ocular application of 1% morphine sulfate would change corneal sensitivity and to identify the duration of action. ANIMAL STUDIED: Eight healthy adult horses. PROCEDURE: Corneal touch threshold (CTT) was measured in the center of one randomly selected eye of each horse by Cochet-Bonnet esthesiometer (Luneau Cochet-Bonnet Esthesiometer; Western Ophthalmics, Lynnwood, WA, USA). Immediately following baseline CTT measurement, 0...
July 17, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28708527/artificially-extended-photoperiod-administered-to-pre-partum-mares-via-blue-light-to-a-single-eye-observations-on-gestation-length-foal-birth-weight-and-foal-hair-coat-at-birth
#4
Margaret B Nolan, Caroline M Walsh, Noelle Duff, Conor McCrarren, Ralph L Prendergast, Barbara A Murphy
In seasonally breeding animals, photoperiod perception is crucial for timing of important physiological events. In the horse, long day photoperiod influences the onset of ovulation and cyclicity, shedding of the heavier winter coat and the timing of parturition. In this compilation of studies, conducted across three breeding seasons and two countries, the impact of artificially extended day length was investigated on gestation length, foal birth weight and foal hair coat at birth. The light therapy was administered to pre-partum mares via mobile head worn masks which provided short wavelength blue light to a single eye...
June 9, 2017: Theriogenology
https://www.readbyqxmd.com/read/28700261/orbital-implant-infection-by-corynebacterium-amycolatum
#5
J Alvaro Toribio, Teresa Marrodán, Isabel Fernández-Natal
Corynebacterium amycolatum is a saprophyte gram-positive bacillus of the skin flora. It has been linked to diverse infections in immunocompromised patients and also of different types of prostheses. However, to our knowledge, there are no reports on its ability to produce ocular infections or to grow over alloplastic materials for orbital surgery. We present a case of orbital implant exposure including pure isolation of C. amycolatum. The patient was referred for discharge in his socket. After removal of the artificial eye, a large area of implant exposure and signs of chronic infection were observed...
July 12, 2017: Orbit
https://www.readbyqxmd.com/read/28689748/in-vivo-corneal-pulsation-in-relation-to-in-vivo-intraocular-pressure-and-corneal-biomechanics-assessed-in-vitro-an-animal-pilot-study
#6
Maja M Rogala, Monika E Danielewska, Agnieszka Antończyk, Zdzisław Kiełbowicz, Marta E Rogowska, Marta Kozuń, Jerzy Detyna, D Robert Iskander
The aim was to ascertain whether the characteristics of the corneal pulse (CP) measured in-vivo in a rabbit eye change after short-term artificial increase of intraocular pressure (IOP) and whether they correlate with corneal biomechanics assessed in-vitro. Eight New Zealand white rabbits were included in this study and were anesthetized. In-vivo experiments included simultaneous measurements of the CP signal, registered with a non-contact method, IOP, intra-arterial blood pressure, and blood pulse (BPL), at the baseline and short-term elevated IOP...
July 6, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28681902/integration-of-scheimpflug-based-corneal-tomography-and-biomechanical-assessments-for-enhancing-ectasia-detection
#7
Renato Ambrósio, Bernardo T Lopes, Fernando Faria-Correia, Marcella Q Salomão, Jens Bühren, Cynthia J Roberts, Ahmed Elsheikh, Riccardo Vinciguerra, Paolo Vinciguerra
PURPOSE: To present the Tomographic and Biomechanical Index (TBI), which combines Scheimpflugbased corneal tomography and biomechanics for enhancing ectasia detection. METHODS: Patients from different continents were retrospectively studied. The normal group included 1 eye randomly selected from 480 patients with normal corneas and the keratoconus group included 1 eye randomly selected from 204 patients with keratoconus. There were two groups: 72 ectatic eyes with no surgery from 94 patients with very asymmetric ectasia (VAE-E group) and the fellow eyes of these patients with normal topography (VAE-NT group)...
July 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28676928/-dermofat-grafting
#8
REVIEW
C Hintschich
Dermofat grafts represent an alternative to alloplastic orbital implants and are used as primary or secondary implants. Advantages are their autologous nature without the risk of foreign body reaction and extrusion or possibly transmission of prions in combination with creating a flat and smooth surface in the socket even under difficult conditions with an excellent motility of the artificial eye. Disadvantages of dermofat grafts are the labor-intensive operative technique with a second operation site and a possible shrinking of the implant...
July 4, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28661456/dry-eye-management-targeting-the-ocular-surface-microenvironment
#9
REVIEW
Xiaobo Zhang, Vimalin Jeyalatha M, Yangluowa Qu, Xin He, Shangkun Ou, Jinghua Bu, Changkai Jia, Junqi Wang, Han Wu, Zuguo Liu, Wei Li
Dry eye can damage the ocular surface and result in mild corneal epithelial defect to blinding corneal pannus formation and squamous metaplasia. Significant progress in the treatment of dry eye has been made in the last two decades; progressing from lubricating and hydrating the ocular surface with artificial tear to stimulating tear secretion; anti-inflammation and immune regulation. With the increase in knowledge regarding the pathophysiology of dry eye, we propose in this review the concept of ocular surface microenvironment...
June 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28650215/tolerability-of-topical-tocilizumab-eyedrops-in-dogs-a-pilot-study
#10
Vatinee Y Bunya, Simone Iwabe, Ilaria Macchi, Mina Massaro-Giordano, Maxwell Pistilli, Gustavo D Aguirre
PURPOSE: The aim of this study was to examine the tolerability of topical tocilizumab eyedrops in normal dogs and to assess whether this preparation alters tear film cytokine levels or conjunctival cytokine mRNA expression. METHODS: Two percent tocilizumab eyedrops were administered to the right eyes and artificial tears to the left eyes of 10 dogs with no anterior segment pathology 3 times daily for 4 weeks. Portable slit-lamp examinations and Schirmer tear testing were performed at baseline and day 1 week 4, as well as 2 weeks after treatment (week 6)...
June 26, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28649802/punctal-occlusion-for-dry-eye-syndrome
#11
REVIEW
Ann-Margret Ervin, Andrew Law, Andrew D Pucker
BACKGROUND: Dry eye syndrome is a disorder of the tear film that is associated with symptoms of ocular discomfort. Punctal occlusion is a mechanical treatment that blocks the tear drainage system in order to aid in the preservation of natural tears on the ocular surface. OBJECTIVES: To assess the effects of punctal plugs versus no punctal plugs, different types of punctal plugs, and other interventions for managing dry eye. SEARCH METHODS: We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (which contains the Cochrane Eyes and Vision Trials Register) (2016, Issue 11), MEDLINE Ovid (1946 to 8 December 2016), Embase...
June 26, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28640840/applying-artificial-intelligence-to-disease-staging-deep-learning-for-improved-staging-of-diabetic-retinopathy
#12
Hidenori Takahashi, Hironobu Tampo, Yusuke Arai, Yuji Inoue, Hidetoshi Kawashima
PURPOSE: Disease staging involves the assessment of disease severity or progression and is used for treatment selection. In diabetic retinopathy, disease staging using a wide area is more desirable than that using a limited area. We investigated if deep learning artificial intelligence (AI) could be used to grade diabetic retinopathy and determine treatment and prognosis. METHODS: The retrospective study analyzed 9,939 posterior pole photographs of 2,740 patients with diabetes...
2017: PloS One
https://www.readbyqxmd.com/read/28628379/visuomotor-behaviors-and-performance-in-a-dual-task-paradigm-with-and-without-vibrotactile-feedback-when-using-a-myoelectric-controlled-hand
#13
Eitan Raveh, Jason Friedman, Sigal Portnoy
Prosthesis users allocate visual attention to their prosthetic hand while performing activities of daily living (ADLs), due to absence of sensory feedback. Dual-task assignments present competition for visual attention and may affect the performance of ADLs. Vibrotactile feedback (VTF) is a frequently-used method to provide prosthesis users with tactile feedback. However, the effect of adding VTF on visual attention and performance in a motor dual-task paradigm has not been investigated. Our aim was to compare visual attention and performance during ADLs in a motor dual-task paradigm when using binary VTF and without using VTF...
June 19, 2017: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/28622318/characteristics-of-symptoms-experienced-by-persons-with-dry-eye-disease-while-driving-in-china
#14
Y Wang, H Lv, Y Liu, X Jiang, M Zhang, X Li, W Wang
PurposeTo assess the vision-related quality of life and self-reported driving performance of patients with dry eye disease (DED).Patients and methodsThe study was performed in the eye centre of Peking University Third Hospital, China. In total, 87 dry eye patients and 42 controls were enroled, including 49 patients without any treatment (group A), 38 patients treated with artificial tears (group B) and 42 controls without DED (group C). The participants had no eye disease other than DED. Scores of a vision-related quality-of-life questionnaire (Ocular Surface Disease Index (OSDI)), a daily life-related visual function questionnaire and a questionnaire about performance during driving were collected...
June 16, 2017: Eye
https://www.readbyqxmd.com/read/28617725/depth-profile-assessment-of-the-early-phase-deposition-of-lysozyme-on-soft-contact-lens-materials-using-a-novel-in-vitro-eye-model
#15
Han Qiao, Chau-Minh Phan, Hendrik Walther, Lakshman N Subbaraman, Lyndon Jones
OBJECTIVE: To characterize the location of fluorescently labeled lysozyme on commercial contact lenses (CLs) using an in vitro eye model that simulates tear volume, tear flow, air exposure, and mechanical wear. METHODS: One commercially available conventional hydrogel CL material (etafilcon A) and three silicone hydrogel CL materials (balafilcon A, lotrafilcon B, and senofilcon A) were evaluated in this study. The CLs were mounted on the in vitro eye model and exposed to artificial tear fluid containing fluorescein isothiocyanate (FITC)-labeled lysozyme for 2 and 10 hrs...
June 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28612282/probing-of-peripheral-blood-mononuclear-cells-anchoring-on-tnf-alpha-challenged-vascular-endothelia-in-an-in-vitro-model-of-the-retinal-microvascular
#16
Yuan Li, Yao Lu, Qiong Chen, Yuejun Kang, Ling Yu
Retinopathy is a complication of diabetes that affects the eyes; it stems from damage to the microvasculature of the retina and eventually compromises vision. The diagnosis of retinopathy is difficult to make because there are no early symptoms or warning signs. Dysfunction of the retina's microvascular networks is believed to be associated with inflammatory cytokines and tumor necrosis factor alpha (TNF-α). To investigate the effect of these cytokines, such as TNF-α, a polydimethylsiloxane (PDMS)/glass hydride microfluidic device reflecting the physiological structure of the retina's microvasculature was developed...
September 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28606267/-comparison-of-two-kinds-of-artificial-tears-on-the-dry-eye-after-phacoemulsification
#17
R You, J Wang, Y Han, L J Liu, W Y Wang
Objective: To compare the curative effect of two different artificial tears on dry eye after phacoemulsification. Methods: Prospective randomized controlled clinical trial. From March to June in 2012, 102 patients (102 eyes) with age-related cataract were treated with phacoemulsification at Beijing Tongren Hospital, Capital University of Medical Sciences, and these eyes were randomly divided into blank group (group A ) 32 cases, treatment group 1 (group B) 35 cases and treatment group 2 (group C) 35 cases. Group A was treated with conventional antibiotics...
June 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28604053/are-fixations-in-static-natural-scenes-a-useful-predictor-of-attention-in-the-real-world
#18
Tom Foulsham, Alan Kingstone
Research investigating scene perception normally involves laboratory experiments using static images. Much has been learned about how observers look at pictures of the real world and the attentional mechanisms underlying this behaviour. However, the use of static, isolated pictures as a proxy for studying everyday attention in real environments has led to the criticism that such experiments are artificial. We report a new study that tests the extent to which the real world can be reduced to simpler laboratory stimuli...
June 2017: Canadian Journal of Experimental Psychology, Revue Canadienne de Psychologie Expérimentale
https://www.readbyqxmd.com/read/28601909/study-of-conjunctival-flora-in-anophthalmic-patients-influence-on-the-comfort-of-the-socket
#19
Alvaro Toribio, Teresa Marrodán, Isabel Fernández-Natal, Honorina Martínez-Blanco, Leandro Rodríguez-Aparicio, Miguel Á Ferrero
PURPOSE: To investigate the relationship between conjunctival flora and comfort of the socket in anophthalmic patients. METHODS: A cross-sectional clinical study including 60 patients with unilateral anophthalmia who wear a prosthetic eye. From each patient three microbiological samples were taken from the lower conjunctival sac (healthy eye, pre-prosthesis, and retro-prosthesis space of socket). The 180 samples obtained were cultured. Samples from a randomized subgroup of 29 patients were measured by spectrophotometry at 540 nm after 48 h of growth, to determine their microbial density (MD)...
June 10, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28599118/sensory-metrics-of-neuromechanical-trust
#20
William Softky, Criscillia Benford
Today digital sources supply a historically unprecedented component of human sensorimotor data, the consumption of which is correlated with poorly understood maladies such as Internet addiction disorder and Internet gaming disorder. Because both natural and digital sensorimotor data share common mathematical descriptions, one can quantify our informational sensorimotor needs using the signal processing metrics of entropy, noise, dimensionality, continuity, latency, and bandwidth. Such metrics describe in neutral terms the informational diet human brains require to self-calibrate, allowing individuals to maintain trusting relationships...
June 9, 2017: Neural Computation
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