Rafael Lazar

This study examines how habitual light exposure-related behaviors affect sleep timing and complaints in a large international sample, finding that outdoor time and device use in bed have significant impacts.

This study examines how sex and seasonality affect melatonin suppression and alertness to light, finding sex differences and seasonal variations in light sensitivity.

This study finds that afternoon-early evening bright light exposure in adolescents reduces later evening melatonin production without affecting sleepiness or vigilance.

This study tests if cone photoreceptors affect melatonin suppression and alertness to light at night, finding no significant effect.

The paper presents a dataset of pupil size and spectral light exposure data collected under natural conditions across the adult lifespan to study retinal input variations.

This study investigates how pupil size changes with age and light conditions in natural environments using real-world data from 83 participants.

The paper tests if S cones contribute to circadian light responses and finds no evidence, suggesting melanopsin is the sole driver.

The paper introduces a framework to quantify visual and non-visual effects of short-wavelength light filters using factors like luminance, melanopsin activation, color shift, and gamut reduction.