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 an acronym for Hyper Text Markup Language. Files that contain the .html file extension store web pages that have been created using the Hyper Text Markup Language. HTML files are created for the purpose of being displayed in a user's Web browser, allowing the formatting of text, images and other website content.The HTML code itself is not actually seen by the user. Instead, the resulting website page is viewed in the user's Web browser.HTML files are usually saved in a text-based format and a website visitor can see the contents of the HTML code by selecting the View and Page Source options from the toolbar of their Internet browser.TML files are created for the purpose of being displayed in a user's Web browser, allowing the formatting of text, images and other website content. The HTML code itself is not actually seen by the user.