Visual acuity and refractive errors in a suburban Danish population: Inter99 Eye Study.

PURPOSE The present study was performed as part of an epidemiological study, the Inter99 Eye Study. The aim of the study was to describe refractive errors and visual acuity (VA) in a suburban Danish population. METHODS The Inter99 Eye Study comprised 970 subjects aged 30-60 years and included a random control group as well as groups at high risk for ischaemic heart disease and diabetes mellitus. The present study presents VAs and refractive data from the control group (n = 502). All subjects completed a detailed questionnaire and underwent a standardized general physical and ophthalmic examination including determination of best corrected VA and subjective refractioning. RESULTS Visual acuity </= 0.05 was found in one eye of one subject and VA </= 0.3 in 11 eyes of 11 subjects. The main cause of reduced visual function was strabismic amblyopia. Myopia (</= - 0.5 D, spherical equivalent refraction) was present in 33.1% of right eyes of the total population but in 56.8% of subjects with a university degree. CONCLUSIONS Strabismic amblyopia was a significant cause of unilateral visual impairment. Myopia was approximately twice as frequent in subjects with a university degree as in the remaining study population.

[1]  Charlotte Glümer,et al.  A randomized non-pharmacological intervention study for prevention of ischaemic heart disease: baseline results Inter99 (1) , 2003, European journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on Epidemiology & Prevention and Cardiac Rehabilitation and Exercise Physiology.

[2]  S. Lydersen,et al.  Prevalence of refractive errors in young and middle-aged adults in Norway. , 2002, Acta ophthalmologica Scandinavica.

[3]  A. Sjølie,et al.  The importance of genes and environment for ocular refraction and its determiners: a population based study among 20–45 year old twins , 2001, The British journal of ophthalmology.

[4]  K Borch-Johnsen,et al.  A New Method for Chd Prediction and Prevention Based on Regional Risk Scores and Randomized Clinical Trials; PRECARD® and the Copenhagen Risk Score , 2001, Journal of cardiovascular risk.

[5]  T. Spector,et al.  Genes and environment in refractive error: the twin eye study. , 2001, Investigative ophthalmology & visual science.

[6]  H. Fledelius,et al.  Myopia profile in Copenhagen medical students 1996-98. Refractive stability over a century is suggested. , 2000, Acta ophthalmologica Scandinavica.

[7]  H. Taylor,et al.  Prevalence and risk factors of myopia in Victoria, Australia. , 1999, Archives of ophthalmology.

[8]  B. Bengtsson,et al.  Refractive changes in the elderly. , 1999, Acta ophthalmologica Scandinavica.

[9]  G. Jacobsen,et al.  Refractive errors among young adults and university students in Norway. , 1998, Acta ophthalmologica Scandinavica.

[10]  P. Zimmet,et al.  Definition, diagnosis and classification of diabetes mellitus and its complications. Part 1: diagnosis and classification of diabetes mellitus. Provisional report of a WHO Consultation , 1998, Diabetic medicine : a journal of the British Diabetic Association.

[11]  J Katz,et al.  Prevalence and risk factors for refractive errors in an adult inner city population. , 1997, Investigative ophthalmology & visual science.

[12]  Y. Shih,et al.  Changes in Ocular Refraction and Its Components Among Medical Students—A 5-Year Longitudinal Study , 1996, Optometry and vision science : official publication of the American Academy of Optometry.

[13]  T. Vinding,et al.  Prevalence of amblyopia in old people without previous screening and treatment , 1991, Acta ophthalmologica.

[14]  T. Teasdale,et al.  DEGREE OF MYOPIA IN RELATION TO INTELLIGENCE AND EDUCATION LEVEL , 1988, The Lancet.

[15]  H. Fledelius Myopia prevalence in Scandinavia: A survey, with emphasis on factors of relevance for epidemiological refraction studies in general , 1988, Acta ophthalmologica. Supplement.

[16]  T. Teasdale,et al.  Myopia and its relationship to education, intelligence and height: Preliminary results from an on‐going study of Danish draftees , 1988, Acta ophthalmologica. Supplement.

[17]  H. Jensen,et al.  Visual acuity in Danish school children , 1986, Acta ophthalmologica.

[18]  W A Ray,et al.  Statistical analysis of multi-eye data in ophthalmic research. , 1985, Investigative ophthalmology & visual science.

[19]  H. Fledelius IS MYOPIA GETTING MORE FREQUENT? A CROSS‐SECTIONAL STUDY OF 1416 DANES AGED 16 YEARS + , 1983, Acta ophthalmologica.

[20]  M. Mäntyjärvi,et al.  INCIDENCE OF MYOPIA IN A POPULATION OF FINNISH SCHOOL CHILDREN , 1983, Acta ophthalmologica.