In Oracle PL/SQL, SYSDATE is a pseudo column which always returns the operating system's current datetime value of DATE type. The format of the DATE output depends on the value of NLS_DATE_FORMAT initialization parameter. Note that: 1  The SYSDATE function requires no arguments.
Brain Conditions. Sudden double vision may be an indication of a serious medical condition. According to AllAboutVision.com, double vision may be caused by stroke, head injury, a brain tumor, brain swelling or an aneurysm. Ocular migraines may cause not only headaches but visual disturbances such as double vision.
Double vision can be due to a number of different events or conditions ranging in severity from a minor concern to one that is serious or life threatening. The dual images can appear horizontally, vertically, or at a tilted angle. Double vision may originate as a problem in one eye or both. Covering one eye eliminates true diplopia, whereas persistence of multiple images with just one eye (monocular diplopia) is usually caused by problems with the eyeâs optical system.