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[Characteristics and frequency of cortical cataracts at an early stage (Reykjavik Eye Study in Iceland)]. 2001

Y Kawakami, and H Sasaki, and F Jonasson, and Y Sakamoto, and M Kojima, and N Takahashi, and K Sasaki, and M Ono, and
Augenklinik der Medizinischen Universität Kanazawa, Department of Ophthalmology, Uchinada 920-0293 Japan. yutaka@kanazawa-med.ac.jp

BACKGROUND The frequency and characteristics of cortical cataract localization within a dilated pupillary area were investigated in a population-based cataract epidemiological survey performed in the city of Reykjavik in Iceland. METHODS Among 1045 randomly selected individuals, the right eyes of 277 persons with mild cortical lens opacification (Grade I) were selected for our study. The localization of cortical cataracts was examined using retroillumination images, which were divided into 56 circular and radial sections, and calculations were made of the percentages for each opacified area. A questionnaire was used to record the number of hours spent outdoors during week days, the time of the day and whether the subjects wore spectacles, sunglasses or hats when outside. RESULTS The percentage of cortical opacification was significantly higher in the lower nasal quadrant than in all other quadrants (p < 0.05). Furthermore, the percentage of opacification localized in the lower nasal quadrant was higher in individuals with a longer history of outdoor activity than those without (p < 0.05). The percentage of opacification in individuals, who have had the habit of wearing sunglasses for outdoor activities lasting longer than half an hour during weekdays in their 20's and 30's was lower in all quadrants and statistically significantly lower in the upper temporal quadrant (p < 0.05) compared to those not wearing sunglasses. CONCLUSIONS This suggests that wearing sunglasses is effective in preventing the development and/or progression of cortical cataracts.

UI MeSH Term Description Entries
D007055 Iceland A country in northern Europe, an island between the Greenland Sea and the North Atlantic Ocean, northwest of the United Kingdom. The capital is Reykjavik.
D007908 Lens, Crystalline A transparent, biconvex structure of the EYE, enclosed in a capsule and situated behind the IRIS and in front of the vitreous humor (VITREOUS BODY). It is slightly overlapped at its margin by the ciliary processes. Adaptation by the CILIARY BODY is crucial for OCULAR ACCOMMODATION. Eye Lens,Lens, Eye,Crystalline Lens
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011795 Surveys and Questionnaires Collections of data obtained from voluntary subjects. The information usually takes the form of answers to questions, or suggestions. Community Survey,Nonrespondent,Questionnaire,Questionnaires,Respondent,Survey,Survey Method,Survey Methods,Surveys,Baseline Survey,Community Surveys,Methodology, Survey,Nonrespondents,Questionnaire Design,Randomized Response Technique,Repeated Rounds of Survey,Respondents,Survey Methodology,Baseline Surveys,Design, Questionnaire,Designs, Questionnaire,Methods, Survey,Questionnaire Designs,Questionnaires and Surveys,Randomized Response Techniques,Response Technique, Randomized,Response Techniques, Randomized,Survey, Baseline,Survey, Community,Surveys, Baseline,Surveys, Community,Techniques, Randomized Response
D002386 Cataract Partial or complete opacity on or in the lens or capsule of one or both eyes, impairing vision or causing blindness. The many kinds of cataract are classified by their morphology (size, shape, location) or etiology (cause and time of occurrence). (Dorland, 27th ed) Cataract, Membranous,Lens Opacities,Pseudoaphakia,Cataracts,Cataracts, Membranous,Lens Opacity,Membranous Cataract,Membranous Cataracts,Opacities, Lens,Opacity, Lens,Pseudoaphakias
D005135 Eye Protective Devices Personal devices for protection of the eyes from impact, flying objects, glare, liquids, or injurious radiation. Goggles,Safety Glasses,Safety Lenses,Sun Glasses, Nonprescription,Device, Eye Protective,Devices, Eye Protective,Eye Protective Device,Glasses, Nonprescription Sun,Glasses, Safety,Lenses, Safety,Nonprescription Sun Glasses,Protective Device, Eye,Protective Devices, Eye
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly

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