Degree of eye opening: A new discomfort glare indicator

作者：Garreton J A Yamin^*; Rodriguez R G; Ruiz A; Pattini A E

来源：Building and Environment, 2015, 88: 142-150.

DOI：10.1016/j.buildenv.2014.11.010

• Daylight glare index
• Visual comfort
• Ocular indicator
• Daylight

The degree of eye opening (DEO) is proposed as a new indicator of glare in sunny climates in the presence of direct sunlight. A laboratory experiment was carried out (n = 20) in a simulated office space where volunteers performed computer office tasks. Four lighting situations, based on ranges of vertical illuminance at the eye level were evaluated. By means of a visible spectrum eye-tracker DEO was registered in each scenario. The proposed indicator was obtained by matherriatical iterations and showed a good correlation with: vertical illuminance at the eye (r = -0.503; alpha = 0.0001), Daylight Glare Probability (DGP) (r = -0.649; alpha = 0.0001) and Glare Sensation Vote (GSV) (r = -0.580; alpha = 0.0001). This new indicator operates in a broad range of lighting conditions, from a low vertical illuminance at the eye scenario with diffuse daylight to a very high vertical illuminance at the eye scenario with uncontrolled direct sunlight. The proposed new indicator satisfies the following criteria: high validity, reliability, diagnostic power and acceptability and it also addresses unresolved aspects of current glare predictive models: GSV, DGP and DGI.

• 出版日期2015-6