According to the American Optometric Association (AOA), children generally should have their first eye exam at 6 months of age, another exam at age three and again at the start of school. Risk-free children should then continue to have their eyes examined every two years until age 18. Children with risk factors for vision problems may need their first eye exam earlier than 6 months of age and may need more frequent eye exams throughout childhood. Examples of risk factors include:
To check for well-formed or valid XML. Note In order to check that XML files are valid, they must have an associated XML Schema. For more information on associating a schema with your XML file, see Assigning Schemas to XML Files.1  Load the XML file you want to check into the XML Designer.2  From the XML menu select Validate XML Data.ote In order to check that XML files are valid, they must have an associated XML Schema. For more information on associating a schema with your XML file, see Assigning Schemas to XML Files. 1  Load the XML file you want to check into the XML Designer.
Or upload it: The validation check is performed against any XML schema or DTD declared inside the XML document. If neither an XML schema nor a DTD is declared, only a syntax check is performed. To validate the XML document against an external XML schema, click below.