Results 241 to 250 of about 165,929 (297)
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2010
The tear film is a thin fluid film, which covers the exposed ocular surface and is essential for the health and normal function of the eye and visual system. The various components of the tear system are highly interdependent such that any abnormality in quantity or quality of the constituents can cause an imbalance in the system, leading to signs and ...
Craig, J. P., Tomlinson, A., McCann, L.
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The tear film is a thin fluid film, which covers the exposed ocular surface and is essential for the health and normal function of the eye and visual system. The various components of the tear system are highly interdependent such that any abnormality in quantity or quality of the constituents can cause an imbalance in the system, leading to signs and ...
Craig, J. P., Tomlinson, A., McCann, L.
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Tear film stability and tear surface tension
Current Eye Research, 1989Surface tension has been measured by the method of Ferguson and Kennedy on small (0.3-0.4 microliter) samples of tears from 65 normal and 35 dry eyes. Non-invasive break-up time (NIBUT) was also measured on the same patients as an indication of tear film stability.
J M, Tiffany, N, Winter, G, Bliss
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Duplex Tear Film Evaporation Analysis
Bulletin of Mathematical Biology, 2017Tear film thinning, hyperosmolarity, and breakup can cause irritation and damage to the human eye, and these form an area of active investigation for dry eye syndrome research. Recent research demonstrates that deficiencies in the lipid layer may cause locally increased evaporation, inducing conditions for breakup.
Stapf, M. R. +2 more
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Tear film imager for dynamic mapping of the human tear film
Applied Optics, 2019Dry eye (DE) disease is a multifactorial disease of the outer ocular surface characterized by several ocular symptoms and mainly by tear film instability. We have developed an optical imaging system, the tear film imager (TFI), which is the first instrument that can directly image the muco-aqueous tear layer physical dimension in vivo and evaluate its ...
Yoel, Cohen +5 more
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International Ophthalmology Clinics, 1980
Current understanding of tear film physiology is based on the anatomy of each of the three layers, as well as on the changes that occur with blinking and on the physicochemical properties of the tear fluid. Abnormalities in tear film may be due to deficiency of aqueous tears or mucin, changes in the lipid layer, inadequate blinking, or epithelial ...
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Current understanding of tear film physiology is based on the anatomy of each of the three layers, as well as on the changes that occur with blinking and on the physicochemical properties of the tear fluid. Abnormalities in tear film may be due to deficiency of aqueous tears or mucin, changes in the lipid layer, inadequate blinking, or epithelial ...
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Journal of Colloid and Interface Science, 1982
Abstract It is shown theoretically that tear film rupture may be caused by the dispersion force with or without the assistance of gravity. Both the surface tension and viscosity of the tear are shown to be stabilizing factors.
S.P Lin, Howard Brenner
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Abstract It is shown theoretically that tear film rupture may be caused by the dispersion force with or without the assistance of gravity. Both the surface tension and viscosity of the tear are shown to be stabilizing factors.
S.P Lin, Howard Brenner
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Acta Ophthalmologica, 2011
AbstractPurpose Patient complaints such as blurry vision are a very common symptom of dry eye syndrome. We will summarize technologies to measure the optical effects of tear film instability.Methods There are several noninvasive techniques for assessing the kinetics of tear film : highâspeed videokeratoscopy, dynamic wavefront sensing and lateral ...
Y NOCHEZ, T HABAY, PJ PISELLA
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AbstractPurpose Patient complaints such as blurry vision are a very common symptom of dry eye syndrome. We will summarize technologies to measure the optical effects of tear film instability.Methods There are several noninvasive techniques for assessing the kinetics of tear film : highâspeed videokeratoscopy, dynamic wavefront sensing and lateral ...
Y NOCHEZ, T HABAY, PJ PISELLA
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Veterinary Clinics of North America: Small Animal Practice, 1990
Abnormalities of the lipid and mucin components of the preocular tear film may result from diseases of the eyelid margins and conjunctiva. Chronic keratoconjunctivitis with epithelial edema and superficial corneal neovascularization, with or without ulceration, characterizes qualitative tear diseases.
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Abnormalities of the lipid and mucin components of the preocular tear film may result from diseases of the eyelid margins and conjunctiva. Chronic keratoconjunctivitis with epithelial edema and superficial corneal neovascularization, with or without ulceration, characterizes qualitative tear diseases.
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Interpretation of Tear Film Breakup
Archives of Ophthalmology, 1977Tear film breakup time (BUT) was measured in 25 normal subjects on 8 different occasions over a period of one month. Reproducibility of the BUT test and factors involved in interpretation of tear film breakup were studied. It was found that of 50 eyes, the average BUT ranged from five to 100 seconds, and that there were noticeable variations (P less ...
G T, Vanley, I H, Leopold, T H, Gregg
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2008
To survey briefly current knowledge on the normal preocular tear film.Sections deal with: (1) Formation of the film, its physical dimensions and rates of inflow and outflow of tears, and briefly the pathways of nervous control of tear production in the main lacrimal gland and accessory lacrimal tissue. (2) The protein and electrolyte composition of the
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To survey briefly current knowledge on the normal preocular tear film.Sections deal with: (1) Formation of the film, its physical dimensions and rates of inflow and outflow of tears, and briefly the pathways of nervous control of tear production in the main lacrimal gland and accessory lacrimal tissue. (2) The protein and electrolyte composition of the
openaire +2 more sources