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 occur by itself with no other symptoms. Depending on the cause, other symptoms may be present with double vision, such as: 1  Misalignment of one or both eyes (a wandering eye or cross-eyed appearance)  Pain with eye movements in one or both eyes.