Abstract
The development of glare models contributes to a better assessment of occupant’s visual comfort in indoor spaces. Eye indicators can dynamically assess glare in sunny climates to avoid visual discomfort. In this work, an eye tracker measures the degree of eye openness in four ranges (occlusion, semi-occlusion, semi-openness, and openness). This work aimed to evaluate how the degree of eye openness is related to vertical illuminance levels (Ev) below 2484 lx (value where the sensation of bothersome glare appears), as well as to determine whether people’s subjective perception of glare follows the glare ranges proposed by Wienold (2019). These parameters were measured in three conditions of perceived glare (noticeable, disturbing, and intolerable). The results showed that the measurement of eye openness in four ranges has the potential to objectively and dynamically quantify the sensation of glare in all the scenarios evaluated. Regarding its relationship with the reference Ev values, the values perceived as noticeable and disturbing were lower than the reference values, while the values perceived as intolerable coincided.