Rigid Contact Lens Design: Effects of Overall Diameter Changes on Tear Pump Efficiency
نویسندگان
چکیده
منابع مشابه
Tear calcium levels and contact lens wear.
Hydrophilic contact lens spoliation can be associated with the deposition of calcium salts. The relationship between the concentration of calcium in tear fluid and contact lens use has been studied in healthy volunteers and in patients using various forms of hard and soft contact lenses, tear samples being collected with Schirmer strips and with lenses in situ. Methods are suggested for correct...
متن کاملCorneal response to rigid contact lens wear.
Three adult rhesus monkeys were subjected to 2 and 24 hours of polymethylmethacrylate (PMMA) contact lens wear. The induced corneal changes were examined with the electron microscope. Mild epithelial oedema as well as early degenerative cell changes was present already after 2 hours' wear. Rigid lens wear for 24 hours produced more severe oedema and cell alterations together with premature cell...
متن کاملTear film, contact lens, and patient-related factors associated with contact lens-related dry eye.
PURPOSE To examine tear film, contact lens, medical, and patient-related factors associated with self-reported contact lens-related dry eye. METHODS Four hundred fifteen contact lens wearers were recruited and enrolled in this phase of a larger cross-sectional study. A variety of tear film (e.g., interferometry, osmolality, phenol red thread, meibography, fluorescein, and lissamine green stai...
متن کاملThe TFOS International Workshop on Contact Lens Discomfort: report of the contact lens interactions with the tear film subcommittee.
Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia Schepens Eye Research Institute and Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts Optometric Technology Group Research & Consultancy, London, United Kingdom...
متن کاملTear film surface quality with rigid and soft contact lenses.
OBJECTIVES The aim of this study was to measure tear film surface quality (TFSQ) using dynamic high-speed videokeratoscopy during short-term (8 hrs) use of rigid and soft contact lenses. METHODS A group of 14 subjects wore 3 different types of contact lenses on 3 different nonconsecutive days (order randomized) in 1 eye only. The subjects were screened to exclude those with dry eye. The lense...
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ژورنال
عنوان ژورنال: Optometry and Vision Science
سال: 1991
ISSN: 1040-5488
DOI: 10.1097/00006324-199103000-00007