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.
Causes of Similar Symptoms to Double vision. Research the causes of these symptoms that are similar to, or related to, the symptom Double vision: 1  Blurred vision (982 causes). 2  Peripheral vision loss (72 causes). 3  Vision changes (2526 causes). 4  Strabismus (266 causes). 5  Diabetes (212 causes). 6  Graves disease (10 causes). 7  Eye muscle trauma.