The human eye is exposed to the largest amount of harmful ultravoilet light on any one day at around 9 am according to the recent joint research by Johnson & Johnson KK and Kanazawa Medical University. The research team examined the amount of UV light to which the sensor in the eyes of a dummy was exposed for one day in each of September and November. According to the September results,the amount peaked at 0.05 volt at between 2 pm and 3 pm.The figures were higher than 0.025 volt between 11 am and 1 pm,the hours during which te sun is usually considered the strongest.