Filtered Eyewear to Prevent Light-induced Melatonin Suppression - Aim 1

Filtered binocular viewing condition will be produced by eyeglasses frames with orange-tinted blue-blocking filter, eliminating all optical radiation for wavelengths shorter than 540 nm. For the filtered monocular condition, only the lens on the eyeglasses frame on the non-dominant eye will be tinted with the blue-blocking filter.

For the unfiltered binocular, the subjects will wear transparent eyeglasses frames with no optical power. Unfiltered monocular vision will be produced by an opaque eyepatch occluding the non-dominant eye.

Dim lights with no filters.