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tear osmolarity

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https://www.readbyqxmd.com/read/28937831/impact-of-smoking-on-the-ocular-surface-tear-function-and-tear-osmolarity
#1
Serdar Aktaş, Mehmet Tetikoğlu, Ahmet Koçak, Metin Kocacan, Hatice Aktaş, Hacı Murat Sağdık, Fatih Özcura
PURPOSE: This study evaluated the effects of cigarette smoking on the ocular surface, tear function, and tear osmolarity. MATERIALS AND METHODS: A total of 50 smokers with at least 5 years of heavy smoking (defined as 1 pack/day) and 51 nonsmoking, healthy individuals were enrolled. Tear osmolarity was measured with an osmometer (TearLab(™) Osmolarity System). Ocular surface examinations involved corneal fluorescein staining, measurement of the tear film breakup time (TBUT), the Schirmer 1 test, measurement of corneal sensitivity with a Cochet-Bonnet esthesiometer, and conjunctival impression cytology...
September 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28886085/meibomian-gland-features-in-a-norwegian-cohort-of-patients-with-primary-sj%C3%A3-gren%C3%A2-s-syndrome
#2
Xiangjun Chen, Øygunn Aass Utheim, Jiaxin Xiao, Muhammed Yasin Adil, Aleksandar Stojanovic, Behzod Tashbayev, Janicke Liaaen Jensen, Tor Paaske Utheim
PURPOSE: To assess the tear film and meibomian gland (MG) features in a Norwegian cohort of patients with primary Sjögren´s syndrome (pSS) and in age- and gender-matched control subjects. METHODS: Thirty-four female patients with pSS (age 52.9±11.9 years) and 32 female control subjects (age 49.0±11.5 years) were recruited. After completion of Ocular Surface Disease Index (OSDI) questionnaire and McMonnies Dry Eye Questionaire, participants underwent measurements of tear osmolarity, tear break-up time (TBUT), ocular surface and corneal staining, Schirmer I test, corneal sensitivity, MG expressibility evaluations, and lid margin morphology examination using slitlamp microscopy...
2017: PloS One
https://www.readbyqxmd.com/read/28884335/association-between-objective-signs-and-subjective-symptoms-of-dry-eye-disease-in-patients-with-systemic-sclerosis
#3
Aniko Rentka, Annamaria Nagy, Jolan Harsfalvi, Gabriella Szucs, Zoltan Szekanecz, Rudolf Gesztelyi, Peter Szodoray, Adam Kemeny-Beke
The aim of this study was to evaluate the association between clinical signs and symptoms of dry eye disease (DED) in patients with systemic sclerosis (SSc). This cross-sectional observational study included 19 SSc patients and 19 normal subjects with no ocular symptoms or ocular surface disorders. Clinical parameters included tear film break-up time (tBUT), Schirmer I, lissamine green (LG) dye, and tear film osmolarity tests, tear production, and tear secretion flow. For assessment of the dry eye symptoms, the Ocular Surface Disease Index (OSDI) questionnaire was administered to all patients...
September 7, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28883442/interdisciplinary-comprehensive-oral-and-ocular-evaluation-of-patients-with-primary-sj%C3%A3-gren-s-syndrome
#4
Behzod Tashbayev, Shermin Rusthen, Alix Young, Bente Brokstad Herlofson, Lene Hystad Hove, Preet Bano Singh, Morten Rykke, Lara Adnan Aqrawi, Xiangjun Chen, Øygunn Aass Utheim, Tor Paaske Utheim, Øyvind Palm, Janicke Liaaen Jensen
A comprehensive evaluation of oral and ocular symptoms and findings in primary Sjögren's syndrome (pSS) patients may provide valuable information for management. Medical history was obtained from female pSS patients, and sex- and age-matched non-SS patients with sicca symptoms (non-SS sicca controls) as well as healthy subjects without sicca complaints (healthy controls). Oral (Summated Xerostomia Inventory, SXI) and ocular (McMonnies Dry Eye questionnaire, MDEIS, and Ocular Surface Disease Index, OSDI) subjective complaints were recorded...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28876961/vitamin-d-replacement-improves-tear-osmolarity-in-patients-with-vitamin-d-deficiency
#5
Muhammed Kizilgul, Seyfullah Kan, Ozgur Ozcelik, Selvihan Beysel, Mahmut Apaydin, Bekir Ucan, Erman Cakal
BACKGROUND: Vitamin D deficiency is a common health problem worldwide. Many parts of the human eye, including the epithelium of the cornea, lens, ciliary body, and retinal pigment epithelium, as well as the corneal endothelium, ganglion cell layer, and retinal photoreceptors, contain vitamin D receptor (VDR). Dry eye is also a common health problem. An adequate tear film is required for maintaining health and function of the eye. Tear hyperosmolarity is considered to be the cause of ocular surface inflammation, symptoms, and tissue damage...
September 6, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28872518/tear-osmolarity-and-correlation-with-ocular-surface-parameters-in-patients-with-dry-eye
#6
Priya M Mathews, Sezen Karakus, Devika Agrawal, Holly B Hindman, Pradeep Y Ramulu, Esen K Akpek
PURPOSE: To analyze the distribution of tear film osmolarity in patients with dry eye and its association with other ocular surface parameters. METHODS: Tear osmolarity and other quantitative dry eye parameters were obtained from patients with 1) clinically significant dry eye (significant symptoms and ocular surface staining, n = 131), 2) symptoms-only dry eye (significant symptoms but no significant ocular surface staining, n = 52), and 3) controls (no significant symptoms or staining, n = 42)...
August 31, 2017: Cornea
https://www.readbyqxmd.com/read/28853743/evaluation-and-review-of-body-fluids-saliva-sweat-and-tear-compared-to-biochemical-hydration-assessment-markers-within-blood-and-urine
#7
REVIEW
M Villiger, R Stoop, T Vetsch, E Hohenauer, M Pini, P Clarys, F Pereira, R Clijsen
Evaluating and testing hydration status is increasingly requested by rehabilitation, sport, military and performance-related activities. Besides commonly used biochemical hydration assessment markers within blood and urine, which have their advantages and limitations in collection and evaluating hydration status, there are other potential markers present within saliva, sweat or tear. This literature review focuses on body fluids saliva, sweat and tear compared to blood and urine regarding practicality and hydration status influenced by fluid restriction and/or physical activity...
August 30, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28812943/tear-osmolarity-is-sensitive-to-exercise-induced-fluid-loss-but-is-not-associated-with-common-hydration-measures-in-a-field-setting
#8
Justin J Holland, Michelle Ray, Christopher Irwin, Tina L Skinner, Michael Leveritt, Ben Desbrow
This investigation (i) examined changes in tear osmolarity in response to fluid loss that occurs with exercise in a field setting, and (ii) compared tear osmolarity with common field and laboratory hydration measures.  Sixty-three participants [age 27.8 ± 8.4 years, body mass 72.15 ± 10.61 kg] completed a self-paced 10 km run outside on a predetermined course. Body mass, tear fluid, venous blood and urine samples were collected immediately before and after exercise.  Significant (p < 0.001) reductions in body mass (1...
August 16, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28811095/can-the-optimum-artificial-tear-treatment-for-dry-eye-disease-be-predicted-from-presenting-signs-and-symptoms
#9
Laika Essa, Deborah Laughton, James S Wolffsohn
PURPOSE: To assess dry eye treatment with four preservative-free dry eye artificial tear treatments to facilitate evidence-based prescribing. METHODS: A randomised, single masked crossover trial of Clinitas Soothe, Hyabak, Tears Again and TheraTears artificial tears was conducted on 50 symptomatic dry eye patients, aged 60.8±14.2years. At baseline and after trialling each treatment for 4 weeks, signs and symptoms were assessed using the Ocular Surface Disease Index (OSDI), non-invasive tear break-up time, fluorescein tear break-up time, tear meniscus height (TMH), Phenol Red test, lid-parallel conjunctival folds (LIPCOF), ocular surface staining, and lipid layer grading and osmolarity (baseline visit only)...
August 12, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28782653/a-maximal-incremental-effort-alters-tear-osmolarity-depending-on-the-fitness-level-in-military-helicopter-pilots
#10
Jesús Vera Vilchez, Raimundo Jimenez, Iker Madinabeitia, Nerijus Masiulis, David Cárdenas
PURPOSE: Fitness level modulates the physiological responses to exercise for a variety of indices. While intense bouts of exercise have been demonstrated to increase tear osmolarity (Tosm), it is not known if fitness level can affect the Tosm response to acute exercise. This study aims to compare the effect of a maximal incremental test on Tosm between trained and untrained military helicopter pilots. METHODS: Nineteen military helicopter pilots (ten trained and nine untrained) performed a maximal incremental test on a treadmill...
August 4, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28771380/antioxidant-and-osmoprotecting-activity-of-taurine-in-dry-eye-models
#11
Claudio Bucolo, Annamaria Fidilio, Chiara Bianca Maria Platania, Federica Geraci, Francesca Lazzara, Filippo Drago
PURPOSE: To assess the protective effects of ophthalmic formulations based on taurine (TAU) and sodium hyaluronate (SH) in ocular surface. METHODS: Rabbit corneal epithelial cells [Statens Seruminstitut Rabbit Cornea (SIRC)] were subjected to oxidative stress (1 mM H2O2) and treated with the following formulations: 0.2% SH, 0.4% SH, 0.4% SH +0.5% TAU. Reactive oxygen species (ROS) were evaluated by commercial kit. Dry eye was induced by atropine sulfate and topical treatment was carried out with the following formulations: 0...
August 3, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28736342/tfos-dews-ii-diagnostic-methodology-report
#12
REVIEW
James S Wolffsohn, Reiko Arita, Robin Chalmers, Ali Djalilian, Murat Dogru, Kathy Dumbleton, Preeya Gupta, Paul Karpecki, Sihem Lazreg, Heiko Pult, Benjamin D Sullivan, Alan Tomlinson, Louis Tong, Edoardo Villani, Kyung Chul Yoon, Lyndon Jones, Jennifer Craig
The role of the Tear Film and Ocular Surface Society (TFOS) Dry Eye Workshop (DEWS) II Diagnostic Methodology Subcommittee was 1) to identify tests used to diagnose and monitor dry eye disease (DED), 2) to identify those most appropriate to fulfil the definition of DED and its sub-classifications, 3) to propose the most appropriate order and technique to conduct these tests in a clinical setting, and 4) to provide a differential diagnosis for DED and distinguish conditions where it is a comorbidity. Symptom screening with the DEQ-5 or OSDI confirms that a patient might have DED and triggers the diagnostic tests of (ideally non-invasive) breakup time, osmolarity and ocular surface staining with fluorescein and lissamine green (observing the cornea, conjunctiva and eyelid margin)...
May 4, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28736338/the-tfos-international-dry-eye-workshop-ii-report-of-the-tear-film-subcommittee
#13
REVIEW
Mark D P Willcox, Pablo Argüeso, Georgi Georgiev, Juha Holopainen, Gordon Laurie, Tom Millar, Eric Papas, Jannick Rolland, Tannin Schmidt, Ulrike Stahl, Tatiana Suarez, Lakshman Subbaraman, Omür Uçakhan, Lyndon Jones
The members of the Tear Film Subcommittee reviewed the role of the tear film in dry eye disease (DED). The Subcommittee reviewed biophysical and biochemical aspects of tears and how these change in DED. Clinically, DED is characterized by loss of tear volume, more rapid breakup of the tear film and increased evaporation of tears from the ocular surface. The tear film is composed of many substances including lipids, proteins, mucins and electrolytes. All of these contribute to the integrity of the tear film but exactly how they interact is still an area of active research...
March 30, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28680052/hyperosmolarity-induced-aqp5-upregulation-promotes-inflammation-and-cell-death-via-jnk1-2-activation-in-human-corneal-epithelial-cells
#14
Yueping Ren, Huihui Lu, Peter S Reinach, Qinxiang Zheng, Jinyang Li, Qiufan Tan, Hanlei Zhu, Wei Chen
Tear film hyperosmolarity and anterior ocular inflammation are two clinical signs that may be indicative of dry eye disease (DED). This condition can cause pathological and functional changes to the anterior ocular surface tissues. A contributing factor may be dysfunctional aquaporin 5 (AQP5) water channels as they are the AQP subtype that expressed in the corneal epithelium and contribute to fluid efflux needed for corneal function. We determined if described hyperosmolarity-induced increases in proinflammatory cytokine expression and cell death are mediated through AQP5 upregulation and JNK1/2 MAPK signaling activation in both primary human corneal epithelial cells (HCECs), and in a HCEC line...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28627956/evaluating-the-effects-of-botulinum-toxin-a-on-tear-metrics-in-patients-with-hemifacial-spasm
#15
Yasmin Poustchi Mali, Robert L Schultze, Edward J Wladis
Hemifacial spasm has been previously shown to result in dry eye and ocular surface diseases. This study was performed to assess the impact of chemodenervation with botulinum toxin on clinically-relevant metrics of tears. Tear osmolarity and lipid layer thickness were measured in patients with hemifacial spasm after they achieved relief from hemifacial spasm via botulinum toxin injections. Twelve eyes of 6 patients with hemifacial spasm (2 men and 4 women; mean age 55.5 years) were assessed in accordance with the Declaration of Helsinki and IRB approval...
June 19, 2017: Orbit
https://www.readbyqxmd.com/read/28585267/intense-pulsed-light-treatment-and-meibomian-gland-expression-for-moderate-to-advanced-meibomian-gland-dysfunction
#16
Julie M Albietz, Katrina L Schmid
BACKGROUND: The aim was to evaluate the efficacy of periocular intense pulsed light therapy combined with meibomian gland expression for chronic dry eye due to moderate to advanced meibomian gland dysfunction. METHODS: This single-institution, open-label prospective study involved 26 participants who received bilateral treatments using a proprietary intense pulsed light device (E > Eye, E-Swin, Paris, France) combined with therapeutic meibomian gland expression at baseline, Week 2 and Week 6...
June 6, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28585260/randomised-controlled-trial-of-topical-antibacterial-manuka-leptospermum-species-honey-for-evaporative-dry-eye-due-to-meibomian-gland-dysfunction
#17
Julie M Albietz, Katrina L Schmid
BACKGROUND: The aim was to evaluate the efficacy of standardised Manuka (Leptospermum species) antibacterial honey as adjunctive twice daily treatment to conventional therapy (warm compresses, lid massage and preservative-free lubricant), in participants with evaporative dry eye due to moderate to advanced meibomian gland dysfunction. METHODS: This prospective, open-label study involved 114 participants. After two weeks of conventional therapy participants were randomised to one of three treatment groups: Optimel Antibacterial Manuka Eye Gel (98 per cent Leptospermum species honey) plus conventional therapy (n = 37), Optimel Manuka plus Lubricant Eye Drops (16 per cent Leptospermum species honey) plus conventional therapy (n = 37) and a control (conventional therapy) (n = 40)...
June 6, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28579744/randomized-comparison-of-in-vivo-performance-of-two-point-of-care-tear-film-osmometers
#18
Jerry Nolfi, Barbara Caffery
PURPOSE: To compare the in vivo precision of two commercially available point-of-care osmometers among normal subjects with no dry eye disease. METHODS: Twenty healthy adults with healthy ocular surfaces were evaluated by licensed eye care practitioners. All subjects had low Ocular Surface Disease Index score (<5), normal tear breakup time (>10 seconds), and no evidence of corneal fluorescein staining. Five consecutive measurements of tear osmolarity were measured on each eye using each of the two osmometers: the TearLab Osmolarity System (TearLab) and the I-Med i-Pen (i-Pen), for a total of 200 measurements per device...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28553560/optical-coherence-tomography-reveals-changes-to-corneal-reflectivity-and-thickness-in-individuals-with-tear-hyperosmolarity
#19
Laura Adelaide Deinema, Algis Jonas Vingrys, Holly Rose Chinnery, Laura Elizabeth Downie
PURPOSE: To investigate whether tear hyperosmolarity, a feature of dry eye disease (DED), affects central corneal thickness (CCT), corneal light reflectivity, and/or tear film reflectivity. METHODS: This prospective, cross-sectional study involved 48 participants (38 with hyperosmolar tears and 10 controls with normo-osmolar tears). Symptoms and signs of DED (tear osmolarity, sodium fluorescein tear break-up time, ocular surface staining, Schirmer test) were assessed...
May 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28547534/a-cross-sectional-comparative-study-on-chronic-ocular-manifestations-of-stevens-johnson-syndrome-and-toxic-epidermal-necrolysis-in-chinese-eyes-a-15-year-case-series
#20
Loraine L W Chow, Alex L K Ng, Sharon S W Chow, Bonnie N K Choy, Kendrick C Shih, Ian Y H Wong, Johnny C Y Chan, Jimmy S M Lai
PURPOSE: To compare the chronic ocular manifestations in Stevens-Johnson syndrome and toxic epidermal necrolysis patients from a 15-year cohort. METHODS: All SJS and TEN patients admitted to our burn intensive care unit between 1999 and 2014 were invited for assessment. Slit-lamp examination was performed, and ocular condition was graded according to the Sotozono scoring System, which depended on the extent of cornea, conjunctiva and lid involvement. Tear osmolarity was also measured...
May 25, 2017: International Ophthalmology
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