Spectral Determinants of Steady-State Pupil Size with Full Field of View

Standards in Pupillography

“…stimulus wavelength (e.g., narrow band chromatic lights, broadband white lights), duration, area, fixation eccentricity and the dark- and light-adaptation levels (and pre-adaptation durations) that are optimized to stratify the rod-cone cut-offs under conditions of dark and light adaptation (11, 35, 99–103) that bias pupil responses to either rods or cones based on their characteristic spatial and temporal summation (104). A rod-favoring-condition may include a dim, short wavelength stimulus (e.g., 4 ms; 0.01 Lux corneal illumination) after prolonged dark adaptation and cone-favoring-condition with a brighter long wavelength stimulus (e.g., 1000 ms; 28 Lux) after a 10 min period of light adaptation (35);…”

The Physiological and Psychological Effects of Windows, Daylight, and View at Home: Review and Research Agenda

“…Short-wavelength light reduces pupil size (Berman, Fein, Jewett, Saika, & Ashford, 1992), which under tight experimental control increases depth of field and improves visual performance (Berman, Fein, Jewett, & Ashford, 1993, 1994. Interestingly, brightness perception is also greater for a given illuminance when the relative contribution of short-wavelength light is greater (Berman, Jewett, Fein, Saika, & Ashford, 1990).…”

Despite Different Wall Colors, Vertical Scotopic Illuminance Predicts Pupil Size

“…3 We have previously shown that the spectral response of pupil size is predominantly a scotopic sensitivity. 4 We have also demonstrated that brightness perception, although not dominated by scotopic spectrum, has a prominent contribution dependent on the scotopic content of the illumination. 5 These effects are manifested when the lit environment is viewed in full visual field, the typical viewing conditions for occupants of building interiors.…”

“…If the room luminance distributions were similar for each of the four wall colors, and if the vertical illuminance at the eye is roughly proportional to the forward luminance, then the relationship found in the present study would be expected from our previous study. 4 However, measurements of luminance at fixed vertical photopic illuminance and various points on the walls . as well as the viewed portion of the ceiling showed large differences depending on the wall color.…”

“…In our previous study on pupil size, 4 we measured the effect of light spectrum for young adult subjects (ages 20 to 40 years) in conditions of almost full field of view and luminances typical of interior lighting conditions. The previous study differed from the study reported here in several ways, so we here describe the conditions of the previous study.…”