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Vision screening of preschool children is designed and performed to identify those affected by amblyopia or related, predisposing visual defects. In order to determine the prevalence of preschool vision screening in Italy, a questionnaire was mailed to the 635 regional health offices in which the...
Graphical representation of changes in epidemiologic or clinical parameters over time is difficult when a large amount of data is involved. The traditional methods either cannot incorporate all necessary information (bar graphs, pie charts, tables) or are unable to depict information on more than...