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As the eyes age pupil size reduces so less light enters the eye. The lens also yellows and thickens with age which impedes the transmission of light as well. Providing more light overall and extra light in task areas might be a simple answer. However, higher levels of light can be uncomfortable and many people become increasingly sensitive to glare. Glare can be discomforting or disabling. Discomfort glare does not interfere with resolution but increases visual fatigue. Disability glare reduces visual acuity, visual performance and functioning. These can exist independently or concurrently. It is important to reduce or remove the sources of glare in the home and workplace. White walls and ceilings that are highly reflective maximize and balance the light in a space. A bright light source, such as a bulb or lamp that is well shielded from view, may provide good lighting in a room and minimize glare. Examples of these for offices and institutional space include indirect lighting located in soffits and fixtures which have shielding devices such as baffles or louvers. For outside glare which cannot be removed it is important to reduce it as much as possible by wearing glasses with tinted lenses, top and side shields, hats with wide brims or peaked bills, or visors. | |||
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