EVIEW ear exchange and contact lenses : A review
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Tear exchange and contact lenses: a review.
Tear exchange beneath a contact lens facilitates ongoing fluid replenishment between the ocular surface and the lens. This exchange is considerably lower during the wear of soft lenses compared with rigid lenses. As a result, the accumulation of tear film debris and metabolic by-products between the cornea and a soft contact lens increases, potentially leading to complications. Lens design inno...
متن کاملThe study of Lysozyme adsorption onto 2-hydroxyethylmethacrylates and Silicon Hydrogel Contact Lenses
In order to increase the water content and the oxygen permeability of hydrogels used in themanufacture of contact lenses, the polar monomer Silicon Hydrogel Contact Lenses (SHCL), and 2-hydroxyethyl methacrylate (HEMA) were copolymerized with the hydrogels. Due to the presence ofpolar monomers in the conventional contact lenses, the major component of the human tear,lysozyme is extensively adso...
متن کاملمیزان استفاده و آگاهی دانشآموزان دبیرستانهای دخترانهی شهر زنجان از لنزهای طبی _ رنگی در سال تحصیلی 1382
Background & objective: The aim of this study was to investigate the knowledge and use of contact lenses by high school female students in Zanjan in 2003. Materials & Methods: The designed questionnaire was randomly distributed among the high school female students. Then the questionnaire’s questions were standardized based on the study. The main sample size was 700. The samples were selected o...
متن کاملPatterns of mucin adherence to contact lenses.
PURPOSE Contact lens wear alters the preocular fluid through factors that include tear deposits on the lens. In the current study, lens-adherent material was extracted to assess whether contact lenses sample mucins from the preocular fluid. METHODS Discarded extended-wear contact lenses were collected from patients with no ocular surface disease. Mucins were extracted in guanidine hydrochlori...
متن کاملبررسی کونژنکتیویت با پاپی های غول آسا وابسته به کنتاکت لنز در 700 بیمار
In view of the rapid expansion of contact lens amongst the users, new dimensions have been added to the domain of ophthalmology: Giant papillay conjunctivitis, a disease caused by different kinds of contact lens, appears weeks or months after they are used, although some patients are struck years later. The predominant symptoms are increased awareness of lenses, ocular itching, blurred vision a...
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