Lighting, performance and age variation.

Details

• Personal Author:
  Weale RA
• Description:
  The relationship between lighting, performance and aging was discussed with emphasis on the ability of the eye to use the light energy available. The diameter of the pupil decreases according to age, with subsequent reduction in the light transmitted by the lens. To achieve the same retinal performance, the old eye requires more light. This problem usually arises only under threshold conditions when the amount of light available is small. According to available evidence, the eye of a 60 year old individual requires about three times the amount of light needed by the eye of a 20 year old person, under threshold conditions. In normal conditions, the amount of light available is sufficient. As a result, the new code developed by the British Illuminating Engineering Society no longer differentiates between the lighting requirements of old and young workers, while taking into account only the amount of light required to perform the task at the workplace. A relationship between the decrease in the sensitivity of the eye as a function of age and the presence of glare, has been established. Accordingly, the photic environment of the older workers can be improved by reducing the number of glare sources in their visual field. A correlation was also found between aging and the probability of developing ocular defects. The probability of acquiring some defect of the eye by age 70 was found to be 92 percent.
• Subjects:
  Accident Prevention Accidents Accidents, Occupational Construction Industry Epidemiology Manufacturing And Industrial Facilities Mining Mortality Occupational Health Railroads Safety Ships

  More +
• Keywords:
  Age-factors Eye-examinations Eyesight Illumination Lighting-systems Task-performance Visual-perception
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Genre:
  Conference/Symposia Proceedings
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  37-43
• NIOSHTIC Number:
  nn:00168703
• Citation:
  The occupational safety and health effects associated with reduced levels of illumination, proceedings of a symposium, July 11-12, 1974, Cincinnati, Ohio. Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHEW (NIOSH) Publication No. 75-142, 1975 Mar; :37-43
• Federal Fiscal Year:
  1975
• Peer Reviewed:
  False
• Source Full Name:
  The occupational safety and health effects associated with reduced levels of illumination, proceedings of a symposium, July 11-12, 1974, Cincinnati, Ohio
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:775783721cdd23254256ad97749630ec73010bc215e9742461c25391c4c6488473ab70c99e5f2e5c46587a9db7b08a875a405a6541e55a1727deae9e74b3fb5a
• Download URL:
  https://stacks.cdc.gov/view/cdc/179858/cdc_179858_DS1.pdf
• File Type:
  [PDF - 1.08 MB ]