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.
There are certain tags you need to put in every HTML document to set it up as a Web page. Here's a look at some required HTML tags. After covering the rules of HTML, we're ready to start coding. To illustrate just what HTML code does, we're going to build a simple page for the fictitious company E-Z Accounting. There are certain tags you need to put in every HTML document to set it up as a Web page. Begin by opening a new document in your text editor. <HTML> is the first tag to appear on every Web page. Add the opening and closing tags to your page like this: