title: Epidemiological studies on UV-related cataract in climatically different countries.
abstract: Cataract epidemiological surveys applying objective judgement through lens images in the climatically different places of Noto and Amami, Japan, Singapore and Reykjavik, Iceland yielded several significant results about the influence of solar UV. 1) The percentage of transparent and of lens opacification was significantly higher in the Reykjavik subjects than in the Singaporeans. 2) The percentages including early changes were higher in Amami and Singapore than in Noto and Reykjavik. 3) Progressed lens opacification was highest in Singapore. While the main type of lens opacification was cortical in Noto and Reykjavik, that of Singapore was nuclear. 4) A significant correlation between cortical opacification and the history of time spent outdoors was noticed. The UV risk for formation and/or progression of cortical opacification should be acceptable from the epidemiological standpoint.
authors.affiliation: Department of Ophthalmology, Kanazawa Medical University, Uchinada, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sasaki
authors.forename: H
authors.initials: H
authors.lastname: Sasaki
authors.forename: M
authors.initials: M
authors.lastname: Kojima
authors.forename: Y B
authors.initials: YB
authors.lastname: Shui
authors.forename: O
authors.initials: O
authors.lastname: Hockwin
authors.forename: F
authors.initials: F
authors.lastname: Jonasson
authors.forename: H M
authors.initials: HM
authors.lastname: Cheng
authors.forename: M
authors.initials: M
authors.lastname: Ono
authors.forename: N
authors.initials: N
authors.lastname: Katoh
mesh_terms: D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000453:epidemiology* / Q000209:etiology*; D016001:Confidence Intervals; D005260:Female; D006306:Health Surveys; D006801:Humans; D007055:Iceland / Q000453:epidemiology; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D011336:Probability; D012307:Risk Factors; D017678:Sex Distribution; D012846:Singapore / Q000453:epidemiology; D014466:Ultraviolet Rays / Q000009:adverse effects*