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.
A major cause of double vision involving both eyes is misalignment of the eyes such that they cannot focus equally on an object. An eye muscle imbalance or refractive (eyeglass) problem can be responsible.This type of double vision can occur in young children whose eyes are misaligned from birth. major cause of double vision involving both eyes is misalignment of the eyes such that they cannot focus equally on an object. An eye muscle imbalance or refractive (eyeglass) problem can be responsible.