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.
Diplopia â this is when blurred vision causes double vision, when the eye is unable to focus on an item or image. Dry eye blurring â this occurs when a dry eye is unable to focus on an item, leading to blurring and discomfort that can be temporarily reduced by blinking.