Table 2: Lighting scenarios presented to all 18 participants in a counterbalanced manner.

Lighting scenarios Evening Morning Dim Light Session <5 lux at the cornea from an incandescent light source <5 lux at the cornea from an incandescent light source Light Session 1 40 lux(0.182 W/)of long-wavelength, red light (λ max630 nm) 40 lux(0.401 W/)of short-wavelength, blue light (λ max470 nm) Light Session 2 <5 lux at the cornea from an incandescent light source 40 lux(0.401 W/)of short-wavelength, blue light (λ max470 nm)