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.
Yet, vision loss issues such as blindness, double vision, or blurry vision can mean any of a number of different things, ranging from dry eyes or glaucoma to migraines or retinal detachments. There is a long list of possible causes of blurry vision. Letâs go over a few of them nowâ¦.