Results 251 to 260 of about 165,929 (297)
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Tear Film Osmolarity in Epiphora
Ophthalmic Plastic & Reconstructive Surgery, 2012To examine whether patients complaining of epiphora have tears of a lower osmolarity.Sixty-three eyes of 39 patients attending an oculoplastic clinic with a primary complaint of epiphora, had their tear osmolarity recorded. Subjects were excluded if they had current or recent topical eye therapy, active ocular infection or allergy, ocular surface ...
George M, Saleh +4 more
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Biomicroscopy of the tear film: the tear film of the pekingese dog
Veterinary Record, 1989Polarised light biomicroscopy was used to examine the normal pre-corneal tear film in 21 eyes of 12 pekingese dogs. The purpose of the study was to examine the influence of excessive exophthalmos on the pre-corneal tear film in the dog. The majority of the animals were found to have high levels of ocular surface contamination by particulate material ...
S D, Carrington +3 more
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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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Estimating Tear Film Spread and Stability Through Tear Hydrodynamics
Optometry and Vision Science, 2012The 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. This study introduces a novel and objective way of determining the upward spread and stability of the tear-film through measurement of tear-film ...
Jalaiah, Varikooty +2 more
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Relationship Between Tear-Meniscus Parameters and Tear-Film Breakup
Cornea, 1997Several flaws exist with the lipid-diffusion model for tear-film breakup. The aim of this study was to test an alternative model of tear-film rupture in which the negative hydrostatic pressure in each tear meniscus (related to the tear-meniscus radius of curvature) is proposed to influence the formation of breaks in the tear film.Measurements of ...
T R, Golding, A S, Bruce, J C, Mainstone
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Journal of The British Contact Lens Association, 1993
In the normal tearfilm, age changes include a decrease in reflex secretion, a reduction in tear turnover rate, lowerconcentrations of lacrimal gland proteins and decreasing tear film stability (BUT). However, tear volume and basal secretion rates are unchanged.
Tomlinson, Alan, Giesbrecht, Careen
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In the normal tearfilm, age changes include a decrease in reflex secretion, a reduction in tear turnover rate, lowerconcentrations of lacrimal gland proteins and decreasing tear film stability (BUT). However, tear volume and basal secretion rates are unchanged.
Tomlinson, Alan, Giesbrecht, Careen
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Tear Film — Contact Lens Interactions
1994Contemporary contact lenses, when considered in perspective, are remarkably effective; the remaining primary challenge, however, appears to be the relationship of the contact lens to the tear film. The number of contact lens wearers in the United States is no longer increasing, perhaps the result of discomfort which may occur initially, preventing ...
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Tear Film Physiology and Contact Lens Wear. II. Contact Lens-Tear Film Interaction
Optometry and Vision Science, 1981The successful fitting of contact lenses requires the practitioner to take into account many properties of the specific lens type used but the practitioner must also understand patient factors including tear properties, use of appropriate solutions, procedures for lens cleaning, and efficiency of blinking.
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