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| A NEW STUDY has found that during spring,
summer and autumn, Ultraviolet light exposure to the eye during early
morning and late afternoon was double that of the mid-morning/early
afternoon period-most often thought of as the peak sun exposure time. Using a specially designed model to measure and record the amount of UV-B rays entering the eye from sunrise to sunset, researchers at Japan’s Kanazawa Medical University concluded that eyes are at greater risk to UV exposure at times that many individuals may not be taking proper steps to protect their eyes. Findings from the study were presented at the 11th annual meeting of the Japanese Ophthalmological Society in Osaka (April 19-22). “While it has long been thought that the risk of UV exposure to the eyes is greatest during the midday hours from 10am to 2pm, this study suggests that from spring through to fall, when the days get longer, the incidence of exposure is actually greatest earlier and later in the day,” said lead researcher professor and chairman Hiroshi Sasaki, Department of Ophthalmology, at the university. Research was conducted on the campus of Kanazawa Medical University, in September and November 2006. After incorporating a tiny UV sensor into the ocular segment of a specially designed model, UV-B rays entering the eye were measured from sunrise to sunset. The visual line of the model was set at 15 degrees below the horizontal line (Normal line of sight when a human walks) and its face followed the path of the sun from East to West, and was placed at the lower front side of the sun all the time. The results were recorded, coupled with various conditions, such as solar altitude (position of the sun relative to the horizon) and the direction of the model’s visual line (angle) or facial or head shape, in a relative manner. “This study further demonstrates the need for all day UV protection of your eyes,” added Cristina Schnider, director, medical affairs, Vistakon, the division of Johnson & Johnson Vision Care. “Over the long-term, the sun can cause irreversible harm to all structures of the eye and surrounding tissue that are left unprotected or under-protected. The most complete measure of UV protection can be achieved with a combination of UV-absorbing sunglasses such as MAUI JIM, a wide brimmed hat, and UV blocking contact lenses.” |