Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-25 @ 3:28 AM
Ignite Modification Date:
2025-12-25 @ 3:28 AM
NCT ID:
NCT00467805
Brief Summary:
The study investigates an acute effect of white-appearing LED light (with a peak in blue portion) vs. red LED light of similar irradiance on reproductive hormones in healthy women.
Detailed Description:
Sixteen healthy women came to the laboratory at 7:30 (wearing dark goggles) at two occasions (separated by 2-3 days, first time - at the 3rd-8th day of their menstrual cycle) to be exposed for 45' to white-appearing or red LED light (sequential allocation). The white light has a distinct peak at 460 nm, the narrow-band red light peaked at 651 nm. The LED devices were positioned at the distance of 50 cm (white) and 45 cm (red) from the eyes to be matched by irradiance (approximately 7.0 microWt/m2); background light in direction of gaze was 5-10 lux. Blood and saliva samples were collected before, in the middle, and during the last minutes of the 45' exposure to be measured later for concentration of luteinizing hormone, follicle-stimulating hormone, prolactin, estrogen, progesterone, and also - for cortisol and melatonin (the last one - in saliva) as well-studied indicators of the direct effect of light.
Study:
NCT00467805
Study Brief:
Protocol Section:
NCT00467805