P-062

Abstract

Background: Eye diseases including cataract, keratitis and pterygium have been reported to be sun exposure-related. The association between macular degeneration and blue light has also been discussed. Moreover, it is hypothesized that retinal exposure to blue light may influence the human circadian rhythm. However, no monitoring devices exist that can measure eyes exposure to visible and ultraviolet (UV) radiation over time, therefore accurate personal exposure assessment has not been possible. Objectives & Methods:We developed a novel mobile sensing system ?Ray Sensing Glass System, RaySeG System? that can continuously measure and record the composition and intensity of light. Subjects wearing the RaySeg System were instructed to walk under various light conditions such as indoor and outdoor all day long. Results:The RaySeg System consists of three sensors embedded in eyeglass. The three sensors are for UV (260-400nm), visible lights (red 615, green 540 and blue 465 nm, peak wavelength each) and illumination intensity, respectively. The total weight of the system is about 100 grams, and the size is comparable with digital audio player. The system continuously recorded a change of visible and UV light exposure under various conditions. Conclusions:After accuracy validation, further experiments with larger numbers of subjects are required. Our final goal is to apply the system for evaluating personal eye exposure to UV and visible light in field epidemiological studies, which outcomes are eye diseases and circadian rhythm abnormality.