107
Research about the impact of age on the perception of light quality by Dr. Karolina M. Zielinska - Dabkowska and Veronika Labancová of the University of Applied Sciences, Technology, Business and Design Wismar/ Germany, has given unexpected results.
need some time to mature. It can also be proved that when getting older, an average observer naturally prefers higher luminance to better colour rendering. With time, our perception changes and the decision about lighting quality is made according to luminance, rather than CRI. Based on the lighting test, there is also an indication that eye surgery might influence capability of the visual system. By some respondents not wearing eyeglasses, due to their earlier eye surgery, the results were worse in comparison to average participants of each group. Therefore, it seems that there is an impact of eye surgery on the perception of light quality. Influence of perception of light quality by respondents wearing prescription eyeglasses was not observed. In the research the connection between the colour of the iris and its impact on perception of colours couldn’t be proven due to the fact, that the amount of tested participants was not sufficient to dedicate any result. Analysed data coming from participants above 40 years old shows that they spend less time in front of a computer compared to the younger generation. Among younger people there was no significant difference in perception of colour appearance between those who work less with computers and those who work more. Therefore, it is very hard to bring any valuable conclusion to this matter. However, younger respondents might have eyesight difficulties later in age, but earlier than their parents, due to the enormous time spent in front of computers and TV screens and the over- exposure to the blue end of the light spectrum which may also contribute to retinal damage and possibly lead to Macular degeneration[5]
.
The above results of the Master Thesis highlight the importance of specifying appropriate values of colour rendering and levels of luminance based on the user’s age. The authors believe that, based on the conducted practical lighting research and by applying the findings in terms of the correct type of light source with the proper CRI and luminance related to the age of the observer, lighting designers can receive a tool to create a proper set of lighting guidelines for different environments. They can support physiological and psychological needs of people, creating welcoming, comfortable human friendly and enjoyable environments in spaces such as: retail, office environment, educational establishments, public and residential buildings or retirement homes.
Authors: Dr. Karolina M. Zielinska - Dabkowska, MSc. Arch, Dipl. Ing. Arch.(FH), PhD, PLDA [Master Thesis mentor and External Examiner Hochschule Wismar/ Germany] Veronika Labancová, MA [Graduate student at Architectural Lighting Design Degree Course, University of Applied Sciences, Technology, Business and Design Wismar/ Germany]
Fig.1. Participants during lighting test.
References: [1] Wright Jr.,K. P.; Hughes, R. J.; Kronauer, R. E.; Dijk D.-J.; Czeisler ,Ch. A.; Intrinsic near-24-h pacemaker period determines limits of circadian entrainment to a weak synchronizer in humans; [online], (URL
http://www.ncbi.nlm.nih.gov/ pmc/articles/PMC61161/), (November 20, 2001); (Accessed: March 6, 2013). Brandi U..; Lighting design Principles Implementation Case Study, 1st ed.; Birkhäuser., Berlin, 2006, p. 8.
[2] Figueiro, M. G.; Rea M. S.; Developing Architectural Lighting Designs to Improve the Health and Well-being of Older Adults; [online], (URL
http://www.aia.org/groups/ek_public/ documents/pdf/aiab079025.pdf); (Accessed: March 6, 2013); p. 9.
[3] Hunt, R.W.G.; Measuring colours, 2nd ed.; Ellis Horwood Ltd., London, 1991; p. 82.
Fig. 2. Lighting test set up scheme, author’s sketch.
[4] Heiting. G.; How Your Vision Changes as You Age; [online], (URL http://http://www.
allaboutvision.com/over60/vision-changes.htmf), (February, 2010); (Accessed: March 30, 2013). American Optometric Association; Adult Vision: 41 to 60 Years of Age, [online], (URL http://www.
aoa.org/x9453.xml), (2006-2013); (Accessed: May 27, 2013); p. 1. Figueiro, M. G.; Rea M. S.; Developing Architectural Lighting Designs to Improve the Health and Well-being of Older Adults; [online], (URL
http://www.aia.org/groups/ek_public/ documents/pdf/aiab079025.pdf); (Accessed: March 6, 2013); p. 7.
Fig. 3. The Xicato LED Module.
Fig. 4. The three different lighting scene settings during the test.
[5] Loughman, J., Davison P.A., Nolan J.M., Akkali M.C., Beatty, S.; Macular pigment and its contribution to visual performance and experience; [online], (URL http://www.
researchgate.net/publication/233731376_Macular_ pigment_and_its_con-tribution_to_visual_ performanceand_experience?ev=pub_cit_inc), (March 29, 2010); (Accessed: March 16, 2013); p. 2. American Academy of Ophthalmology; What Is Age-Related Macular Degeneration?; [online] (URL
http://www.geteyesmart.org/eyesmart/diseases/ amd.cfm), (2013); (Accessed: March 16, 2013). Chaine, G., Hullo, A., Sahel, J., Soubrane, G., Espinasse-Berrod, M.-A., Schutz, D., Christian Bourguignon, Ch., Catherine Harpey, C., Brault, Y., Coste, M., Moccatti, D., Hubert Bourgeois, H.; Case-control study of the risk factors for age related macular degeneration; [online], (URL
http://bjo.bmj.com/content/82/9/996. full#target-1), (2013); (Accessed: March 16, 2013).
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150