Let there be light… but not glare!
We have all experienced the uncomfortable or even debilitating effects of glare. Too often we step out of a darker house into the bright outdoors or we are driving to reach the top of a hill or crest and get blinded by the full sun! Glare is a visual sensation caused by too much brightness and can be termed disability glare or discomfort glare.1
Disability glare is when intense light sources actually reduce visibility whereas discomfort glare is when a very bright light causes annoyance or even pain2. Older people are more sensitive to glare due to the changes of the eye structure that occur with age3.
Don’t forget the office staff too – glare impacts on the ability to see the computer clearly!
1. Lighting Research Centre, 2007. Light Pollution Questions and Answers. http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/lightpollution/glare.asp
2. Rea, M.S. 2000. IESNA Lighting Handbook: Reference and Application, 9th edition. New York: Illuminating Engineering Society.
3. Jaul, E., & Barron, J. 2017. Age-Related Diseases and Clinical and Public Health Implications for the 85 Years Old and Over Population. Frontiers in Public Health, 5, 335. http://doi.org/10.3389/fpubh.2017.00335.
4. Benbow, W. 2013. Lighting and noise design in dementia care facilities. Canadian Nursing Home. 24(3):4-11.