منابع مشابه
Evaluation of Colour Correcting X Chrome Contact lenses
Approximately 5% of the world’s population suffer from what is commonly called colour blindness. A small number of products are on the market that claim to improve colour discrimination for colour-blind observers. This study evaluates the performance of a particular product (Colour Correcting lenses) product by performing psychophysical experiments with a colour-blind observer. Without correcti...
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Hexavalent chromium wastes need to be chemically reduced to trivalent chrome in the shop’s treatment plant. This necessitates the use of expensive chemicals such as sulfur dioxide, sodium metabisulfite or sodium borohydride. Also considerable hazardous sludge is generated during the neutralization step of the treatment process due to the high chromium concentration of the plating solutions. Haz...
متن کاملVisual performance with simultaneous vision multifocal contact lenses.
PURPOSE The aim was to assess visual performance after PureVision high addition multifocal contact lens (PM) fitting through contrast sensitivity measured under different illumination levels for both distance and near. METHODS In a cross-over study, 20 presbyopic patients were randomly assigned to PM or spectacles. Near contrast sensitivity was measured with the Vistech VCTS 6500 system. ...
متن کاملActive Stereo Vision System with Foveated Wide Angle Lenses
A novel active stereo vision system with a pair of foveated wide angle lenses is presented. The projection curve of the lens is designed so that it facilitates active vision algorithms for motion analysis, object identi cation, and precise xation. A pair of such lenses are mounted on a specially designed active stereo vision platform. It is compact and light so that it can be mounted on a mobil...
متن کامل[Double vision caused by double intraocular lenses].
An 80-year-old man had intraoperative loss of an intraocular lens (IOL) in the vitreous and simultaneous implantation of an anterior chamber lens. For the first 3 years his course was uncomplicated, but after this time he noted monocular double vision. The IOL in the vitreous had moved into the optic axis of the eye. The case presented here underlines the possibility of complications occurring ...
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ژورنال
عنوان ژورنال: Optometry: Open Access
سال: 2017
ISSN: 2476-2075
DOI: 10.4172/2476-2075.1000125