“Outdoor activities may increase the odds of developing exfoliation syndrome (XFS) in the eyes, a condition which has been linked to cataracts and glaucoma,” according to Medical News Today. “XFS is a harmful aging of the eye associated cataracts, elevated intraocular pressure and retinal vein blockage. There is evidence that climate factors contribute to XFS. For example, aboriginal Australians who spend lots of time outdoors have a higher prevalence of the disorder. But the relationship between ultraviolet (UV) radiation (UVR) and XFS needs further study because some reports of a link have not been consistent. The authors examined the relationship between UVR and XFS in a study with clinic participants in the United States (118 cases, 106 control patients) and Israel (67 cases, 72 control participants). The authors analyzed the latitude where people lived and the average number of hours per week that they spend outside.” Read more.