Human Factors Issues of Glare :: Optometry Vision Glare Essays

Human Factors Issues of Gl areThe problem of calcium light affects all individuals. Although it is usually lonesome(prenominal) a fleeting annoyance, glare can have grave consequences. For instance, problems caused by glare from computer screens account for 10 million optometrist examinations per form (Berman, 1998). There are two types of glare uneasiness glare and disablement glare. The types of glare are distinguished by their origin. Discomfort glare comes from an out-of-door source it is the physical sensation one suffers in the presence of a light source that is too bright. An example of discomfort glare is the experience of stepping outside on a bright day just later leaving a dark movie theater. Surfaces such as reversal and sidewalks can cause discomfort glare (Ludt, 1997). Discomfort glare affects everyone. hindrance glare, however, has an internal source. It is intrinsic to the individual due to aging or disease. hindrance glare refers to intraocular scattering of light that interferes with normal visual functioning by decreasing image contrast on the retina. These individuals have a drain sensitivity to high levels of illumination. Streetlamps, floodlights, and the solarise are examples of everyday encounters that can induce, and take on recovery time from, disability glare. The pervasive and insidious nature of glare demands additional research. This paper examines discomfort glare, disability glare, the reasons why they warrant pass on research, and the direction of this research.Because discomfort glare refers to reflection sources in the field of vision, the closely simple way to guard against discomfort glare is to modify the environment. few of the sources of discomfort glare are the sun, unshielded streetlamps, floodlights, computer screens, and parabolic luminaires. When the sun is low on the horizon, early in the morning and at dusk, discomfort glare peaks because the suns illumination is much brighter than other objects an d these objects conk out difficult to see. (Ludt, 1997). Protective gear may be sufficient to embarrass the overhead rays of the sun in between dusk and dawn. A indemnity for discomfort glare caused by the sun is simply to wear a visor while outdoors. A brim that extends 3 inches forward should handicap light from entering the pupil. Sunglasses with yellow, orange, or red tinted lenses may simplification discomfort glare (Ludt, 1997).Unshielded streetlamps, or semi-cutoff luminaires, fail to make streets safer because their high-wattage bulbs sheen light throughout the entire surrounding area. Full cutoff optics are a less bright and ultimately safer alternative.