Effects of ambient illumintaion_accepted copy Nov12.pdf (642.49 kB)
Supporting the development of inclusive products: the effects of everyday ambient illumination levels and contrast on older adults’ near visual acuity
journal contribution
posted on 2014-06-03, 12:38 authored by Edward Elton, D. Johnson, Colette Nicolle, Laurence CliftLaurence CliftCurrent older adult capability data-sets fail to account for the effects of everyday environmental conditions on capability. This article details a study that investigates the effects of everyday ambient illumination conditions (overcast, 6000 lx; in-house lighting, 150 lx and street lighting, 7.5 lx) and contrast (90%, 70%, 50% and 30%) on the near visual acuity (VA) of older adults (n = 38, 65–87 years). VA was measured at a 1-m viewing distance using logarithm of minimum angle of resolution (LogMAR) acuity charts. Results from the study showed that for all contrast levels tested, VA decreased by 0.2 log units between the overcast and street lighting conditions. On average, in overcast conditions, participants could detect detail around 1.6 times smaller on the LogMAR charts compared with street lighting. VA also significantly decreased when contrast was reduced from 70% to 50%, and from 50% to 30% in each of the ambient illumination conditions.
History
School
- Design
Citation
ELTON, E. ... et al, 2013. Supporting the development of inclusive products: the effects of everyday ambient illumination levels and contrast on older adults’ near visual acuity. Ergonomics, 56 (5), pp. 803-817Publisher
© Taylor and FrancisVersion
- AM (Accepted Manuscript)
Publication date
2013Notes
This is an accepted manuscript of an article published by Taylor and Francis Group in Ergonomics on 25/03/13 available online at: http://dx.doi.org/10.1080/00140139.2013.770926ISSN
0014-0139Publisher version
Language
- en