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.
HTML is great. It defines the structure of webpages and it determines how data is displayed online. What youâre looking at right now is HTML code, read and interpreted by your browser. But this doesnât make HTML a programming language. A Markup Language. HTML is a type of markup language. It encapsulates, or âmarks upâ data within HTML tags, which define the data and describe its purpose on the webpage. The web browser then reads the HTML, which tells it things like which parts are headings, which parts are paragraphs, which parts are links, etc.