Performance of a new device for the clinical determination of light discomfort

Montés‐Micó, Robert; Cerviño, Alejandro; Martínez-Albert, Noelia; García‐Marqués, José Vicente; Marie, Sarah

doi:10.1080/17434440.2020.1837623

Cited by 4 publications

(3 citation statements)

References 46 publications

(76 reference statements)

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“…Although there are some devices used in clinical determinations of individuals' discomfort glare through electromyograms, 66 or to measure an individual's sensitivity to discomfort glare, 67 these objective methods are usually considered invasive with the attachments of electrodes around the eye in the former or cover the entire field of view in the latter. Physiological and ocular data such as pupil diameter, pupil unrest index, and eye fixation rate were also found to correlate with glare stimuli 67 but no thresholds to describe glare degree were derived. Artificial intelligence has also been trained to predict if the occupant experiences discomfort glare.…”

Section: Limitationsmentioning

confidence: 99%

Comparison of questionnaire items for discomfort glare studies in daylit spaces

Quek,

Jain,

Karmann

et al. 2023

Lighting Research & Technology

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When studying discomfort glare, researchers tend to rely on a single questionnaire item to obtain user evaluations. It is unclear whether the choice of questionnaire item affects the distribution of user responses and leads to inconsistencies between studies. This study aims to investigate if different glare questionnaire items yield similar distributions of user discomfort in daylit environments. We conducted a comparative study of selected questionnaire items from previous glare experiments, testing them in three independent user studies with different lighting conditions and glare stimuli. We compared the resulting outputs across questionnaire items with 540 data points from 149 participants. Results indicated that ordinal questionnaire outputs show strong correlations (0.68 < ρ < 0.85), high internal reliability (α = 0.93) and captured the same latent construct. Binary questionnaire items reflected different glare thresholds but still correlated well with ordinal items. The construct validity of tested questionnaire items was confirmed through responses to an open-ended question. These findings suggest that the tested questionnaire items may be used for category rating-type discomfort glare evaluations and consistently capture the same construct.

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Section: Limitationsmentioning

confidence: 99%

Comparison of questionnaire items for discomfort glare studies in daylit spaces

Quek,

Jain,

Karmann

et al. 2023

Lighting Research & Technology

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“…The acquisition protocol and reliability of measurements have been previously described in detail elsewhere. 5 Light sensitivity is computed using a mean of six logarithmic illumination thresholds.…”

Section: Light Discomfort Thresholdsmentioning

confidence: 99%

“…4 In a healthy population, there is a large range of discomfort thresholds and light sensitivity. 5 In the scientific literature, some physiological factors have been considered to better understand this variability within a healthy population.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Physiological Parameters on Discomfort Glare Thresholds Using LUMIZ 100 Tool

Marie

Montés‐Micó

Martínez-Albert

et al. 2021

Trans. Vis. Sci. Tech.

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To assess the links between discomfort glare sensitivity and physiological factors such as eye biometry, refraction, skin phototype, age, and gender among a large sample of healthy human subjects.Methods: A total of 489 participants who were 20 to 70 years old (241 men, 248 women) underwent discomfort glare threshold measurements via the LUMIZ 100. Eye biometry and optical quality were measured using a Zeiss IOLMaster 700 biometer and i.Profiler aberrometer. Iris color, skin tone, age, gender, eyeglasses use, chronotype, fatigue level, self-evaluation of light sensitivity, and time spent outdoors were determined. Statistical analysis was carried out using nonparametric Mann-Whitney and Kruskal-Wallis tests for categorical data and correlation coefficients for numerical data. Results:The female subgroup had lower discomfort thresholds than the males (P < 0.001). There was no effect of age group, ametropia, eye biometry, iris color, skin tones, chronotype, or fatigue level on discomfort thresholds. Discomfort thresholds were related to self-assessment of light sensitivity, sunglasses ownership, and frequency of use (P < 0.001).Conclusions: Exploration of easily measurable physiological parameters and questionnaire failed to provide reliable indicators of individual light sensitivity to discomfort glare.Translational Relevance: Light sensitivity is highly subjective and variable across the population. Patients frequently complain about light bothering their daily lives. Accessible physiological factors and questionnaires are unable to predict discomfort levels due to glare. The LUMIZ 100 provides a reliable, rapid, and safe way to determine light discomfort thresholds in order to better manage light sensitivity in clinical care.

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