Using Corneal Oxygen Demand to Optimize Rigid Contact Lens Design
نویسندگان
چکیده
منابع مشابه
Corneal 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 کاملCritical Contact Lens Oxygen Transmissibility and Tear Lens Oxygen Tension to Preclude Corneal Neovascularization.
OBJECTIVE The purpose of this study is to determine the peripheral oxygen transmissibility (pDk/t) and respective central oxygen transmissibility (cDk/t) in soft contact lenses (SCLs) which might preclude SCL-driven corneal neovascularization (NV) in healthy myopic SCL users. METHODS Twenty subjectively successful SCL-wearing patients who presented with asymptomatic but active peripheral corn...
متن کاملContact lens related corneal ulcer.
A corneal ulcer caused by infection is one of the major causes of blindness worldwide. One of the recent health concerns is the increasing incidence of corneal ulcers associated with contact lens user especially if the users fail to follow specific instruction in using their contact lenses. Risk factors associated with increased risk of contact lens related corneal ulcers are: overnight wear, l...
متن کاملRigid Gas Permeable Contact Lens as a Vision-Sparing Tool in Children After Traumatic Corneal Laceration.
PURPOSE To evaluate the clinical value of rigid gas permeable contact lenses in children after traumatic corneal scarring. METHODS This comparative study included 15 children (age range: 5.7 to 14 years; mean ± standard deviation = 9.4 ± 2.9 years) with corneal scars and best corrected visual acuity (BCVA) of worse than 20/20, history of penetrating ocular trauma, and/or cataract extraction. ...
متن کاملProliferation rate of rabbit corneal epithelium during overnight rigid contact lens wear.
PURPOSE To examine cell proliferation of the normal corneal epithelium and during extended rigid gas-permeable (RGP) lens wear. METHODS Twenty-three New Zealand White rabbits were fitted unilaterally with either a low oxygen transmissible (Dk/t) or hyper-Dk/t RGP lens, with the other eye serving as a control. The rabbits were injected with 5-bromo-2-deoxyuridine (BrdU) 24-hours later and kill...
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ژورنال
عنوان ژورنال: Optometry and Vision Science
سال: 1993
ISSN: 1040-5488
DOI: 10.1097/00006324-199310000-00001