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.
There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Normal peripheral vision - most people can see double if they look to the extreme of the peripheral vision field. 2  Head trauma. 3  Eye injury.  Brain 1  injury. Orbital fracture. 2  Cataracts. Eye alignment disorder.  Internuclear opthalmoplegia.