Results 201 to 210 of about 4,315,419 (235)
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Stability of the Precorneal Tear Film: A Review
Australasian journal of optometry, The, 1991Numerous studies have been done on the tear physiology and stability of the precorneal tear film and various hypotheses explaining the mechanism of tear rupture and formation have been proposed. One hypothesis proposed that the film stability was caused by the spreading of mucin along the lipid-aqueous interface which increases the film pressure.
Pauline Cho
exaly +2 more sources
Evaluating Tear Film Stability in the Human Eye With High-Speed Videokeratoscopy [PDF]
IEEE Transactions on Biomedical Engineering, 2005 High-speed videokeratoscopy (HSV) is an emerging technology that has the potential to acquire information on the dynamics of corneal topography and tear-film behavior.
Michael J Collins +2 more
exaly +3 more sources
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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In vivo tear-film thickness determination and implications for tear-film stability
Current Eye Research, 1998Previous measurements of tear-film thickness in vivo are limited and cannot be easily applied in a clinical setting. A novel technique to measure tear-film thickness indirectly is introduced here, requiring only a slit lamp, video camera, and computer.
J L, Creech +3 more
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Tear film secretion and stability in welders
Contact Lens and Anterior Eye, 2018Welders are prone to ocular injuries and ocular surface problems due to exposure to ultraviolet light. The aim of this study was to evaluate the tear film comprehensively and assess objective and subjective indices of dry eye in welders.In this historical cohort, welders with at least 5 years of experience were compared with controls.
Amir, Asharlous +5 more
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A New Hypothesis on Tear Film Stability
Ophthalmologica, 2010Classically, the stability of the lacrimal film is due to the surfacting of the epithelial surface by the mucus produced by the goblet cells. However, there are many objections to this hypothesis. Deducing from electron microscopy of the epithelial cells, which shows vesicles in the superficial layer and glycocalix threads on the microvilli and other ...
S, Liotet +3 more
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The Influence of Tear Proteins on the Film Stability of Rabbit Tear Extracts
Journal of Ocular Pharmacology and Therapeutics, 1998This study was undertaken to gain an understanding of the significance of tear proteins in stabilizing the tear film. Either a sigma agonist, N,N-dimethyl-2-phenylethylamine HCl (AF2975), or a sigma antagonist, haloperidol, was administered to rabbit eyes in order to increase or decrease protein secretion, respectively.
R D, Schoenwald +3 more
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Estimating Tear Film Spread and Stability Through Tear Hydrodynamics
Optometry and Vision Science, 2012ABSTRACT Purpose. The stability and ease of spread of the tear‐film over the contact lens surface may be an indicator of contact lens surface dewetting. The present in vivo methods of determining lens dewetting are complex.
Jalaiah, Varikooty +2 more
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Changes in Tear Flow and Tear Film Stability After Photorefractive Keratectomy
Cornea, 1999To investigate the changes in tear flow and tear film stability after photorefractive keratectomy (PRK) for myopia.One eye of 32 patients underwent unilateral PRK procedure for the correction of myopia ranging from -1.50 to -6.00 diopters (D) (mean -3.65 +/- 1.55 D).
Ozdamar, Akif +4 more
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Current methods of tear film stability assessment
Vestnik oftal'mologii, 2019Dry eye syndrome (DES) is a multifactorial disease of the ocular surface characterized by a loss of homeostasis of the tear film, and accompanied by ocular symptoms, in which tear film instability and hyperosmolarity, ocular surface inflammation and damage, and neurosensory abnormalities play etiological roles. The clinical manifestations of DES can be
T N, Safonova +2 more
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