Reflected glare often inte1feres with vision. Since such glare is usually polarized it can be controlled with polarizers. The use of polarized filters to eliminate vertically polarized glare from blackboards and glossy printed material is presented. Practical means for the construction of such filters are discussed. KEY WORDS-reflected glare, polarized lenses, classroom blackboard, low vision, ...

Oncoming headlights sometimes cause disability glare that may obscure driver’s vision, both foveal and peripheral. The effects of disability glare on foveal vision have been investigated by many researchers for about 70 years and are generally specified by equivalent veiling luminance (e.g. Stiles and Crawford, 1937). However, few researchers have studied how disability glare impairs peripheral...

PURPOSE To evaluate the factors affecting postoperative visual function in eyes with Artisan phakic intraocular lenses (PIOLs). METHODS This study examined a retrospective noncomparative case series. Phakic IOLs were implanted in 60 eyes of 36 patients with high myopia. Contrast sensitivity for spatial frequencies of 1.1, 1.7, 2.6, 4.2, 6.6, and 10:4 cycles per degree with and without glare a...

To model discomfort glare from LED road lighting, the effect of four key variables on perceived glare was explored. These variables were: the average glare source luminance (Lg), the background luminance (Lb), the solid angle of the glare source from the perspective of the viewer (ω) and the angle between the glare source and the line of sight (θ). Based on these four variables 72 different lig...

Visibility is one of the basic requirements for safe driving; any type of obscurity in a driver’s vision can interfere with the driving task and impose a threat to the roadway safety. Glare is known to be one of the significant factors causing vision obstruction. One would agree that headlamps are not the only source of glare. Sometimes, sunlight may also obstruct a driver’s vision and contribu...

Visibility is one of the basic needs for safe driving. Any type of reduction in visibility can lead drivers to change driving behavior resulting in changes in flow or speed, disorder on the network as a result of braking or driver error, or in the worst case to an incident or a crash. Glare can be caused by sun, headlights of other vehicles or other light sources can cause substantial reduction...

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The effects of surface-functionalized Na+-montmorillonite nanoclay particles on the flexural behavior of E-glass fiber-reinforced aluminum (GLARE) laminates were investigated. The nanoclay particles were subjected to surface functionalization using 3-(trimethoxysilyl)propylamine to increase their compatibility with the epoxy matrix and improve their dispersion within the matrix. Expe...

Appearance in High Dynamic Range images is controlled by intraocular glare and physiological spatial contrast. Increasing the number of high luminance pixels in a display increases glare and reduces the dynamic range of luminances on the retina. Simultaneous contrast makes areas with higher glare related luminances look darker. Previous experiments measured the range needed for the appearance b...