Degree of eye opening: A new discomfort glare indicator

Garretón, Julieta Alejandra Yamin; Rodríguez, Ricardo A.; Ruiz, Azahara; Pattini, Andrea Elvira

doi:10.1016/j.buildenv.2014.11.010

Cited by 31 publications

(13 citation statements)

References 24 publications

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“…This last factor is the principal component of the equation. The DGP index performs better than the existing metrics in the presence of daylight [12,13]. However, DGP showed limitations for glare prediction in extreme sun situations, which are frequently found in sunny climates [13].…”

Section: Accepted Manuscript 1 Introductionmentioning

confidence: 94%

A global evaluation of discomfort glare metrics in real office spaces with presence of direct sunlight

Garretón

Colombo

Pattini

2018

Energy and Buildings

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights  A new equation was proposed for evaluating glare in offices with direct sunlight  Absolute and relative glare values were evaluated in real working conditions  Percentage of central and near FOV over 2000cd/m2 was tested as absolute glare factor

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Section: Accepted Manuscript 1 Introductionmentioning

confidence: 94%

A global evaluation of discomfort glare metrics in real office spaces with presence of direct sunlight

Garretón

Colombo

Pattini

2018

Energy and Buildings

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“…In daylight glare research, the most common is a 4-point scale introduced by (Osterhaus, 1992). This scale goes from Imperceptible glare to Noticeable, Disturbing, and Intolerable glare, and has been used frequently in recent discomfort glare studies (Kuhn, 2013, Wienold, 2006, Konstantzos, 2016, Yamin Garretón, 2014, Painter, 2009, Erell, 2014.…”

Section: Discomfort Glare Scalementioning

confidence: 99%

Discomfort Glare Cut-Off Values From Field and Laboratory Studies

Pierson

Khanie

Bodart

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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For the application of discomfort glare metrics, a categorisation is used, dividing the metric scale into categories of perception. These categories are separated by borderline values, or so-called cut-off values. Recent literature shows that these cut-off values are lower when they are derived from field study data than those derived from laboratory study data. To investigate this further, the data from one field study and two laboratory studies was used to derive and compare cut-off values corresponding to three borderlines. The results show that the field study cut-off values were systematically lower than the laboratory study ones, implying that discomfort glare is reported at lower stimulus magnitudes in the field. Although further research is required on that topic, several hypotheses are discussed in order to explain the gap between cut-off values derived from field data and cut-off values derived from laboratory data. Recommendations for future studies are also provided.

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“…Knowing that the luminance distribution across different regions of the field-ofview [50], [51] and the relationship between these regions can contribute to subjective visual comfort perception [52] and behavioral objective responses [53], [54], [55], the changes in this relations caused by gaze shifts should be observed. Nevertheless, the assumption behind existing prediction metrics is that gaze direction is fixed and directed towards a task area.…”

Section: A Preliminary Gaze Responsive Light-driven (Gr L ) Modelmentioning

confidence: 99%

A human-centric approach to assess daylight in buildings for non-visual health potential, visual interest and gaze behavior

Ámundadóttir

Rockcastle

Khanie

et al. 2017

Building and Environment

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This paper introduces a novel approach for the assessment of daylight performance in buildings, venturing beyond existing methods that evaluate 2-dimensional illumination and comfort within a fixed field-of-view in order to predict human responses to light concerning non-visual health potential, visual interest, and gaze behavior in a visually immersive scene. Using a 3D rendered indoor environment to exemplify this coordinated approach, the authors assess an architectural space across a range of view directions to predict non-visual health potential, perceptual visual interest, and gaze behavior at the eye level of an occupant across an immersive field-of-view. This method allows the authors to explore and demonstrate the impact of space, time, and sky condition on three novel daylight performance models developed to predict the effects of ocular light exposure using a humancentric approach. Results for each model will be presented in parallel and then compared to discuss the need for a multi-criteria assessment of daylight-driven human responses in architecture. A parallel and comparative approach can allow the designer to adapt the architectural space based on the program use and occupants needs.

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Degree of eye opening: A new discomfort glare indicator

Cited by 31 publications

References 24 publications

A global evaluation of discomfort glare metrics in real office spaces with presence of direct sunlight

A global evaluation of discomfort glare metrics in real office spaces with presence of direct sunlight

Discomfort Glare Cut-Off Values From Field and Laboratory Studies

A human-centric approach to assess daylight in buildings for non-visual health potential, visual interest and gaze behavior

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