Files stored in the UPD format are more commonly known as program update information files. These .upd files are text documents, and its content can be viewed by any text editing or word processing application. Users of Microsoft Windows-based systems can use the Microsoft Notepad application to open and edit these .upd text documents.
Croup (acute laryngotracheobronchitis) on X-ray with steeple sign. Croup, also called acute laryngotracheobronchitis is caused by viral infection of the upper airway usually parainfluenza virus or respiratory syncytial virus (RSV).
You can tell whether you have astigmatism by looking at your eye prescription. The box 'Cyl' will show the power you need to correct astigmatism, if you have one. Axis tells the manufacturer of the glasses or contact lenses where the astigmatism is and where the power should be to correct it. Causes of Astigmatism. Astigmatism is caused when the cornea of the eye becomes oblong or oval rather than spherical. A cornea which has astigmatism has two curves, a flat curve and a steep curve so light is focused at two points instead of more clearly at just one point.