Microvascular Cranial Nerve Palsy Download PDF, 2.78MB, PDF Microvascular Cranial Nerve Palsy is the most common cause of double vision in persons above 50 years old. Movement of our eyes are controlled by muscles. These muscles receive signals from nerves, and these nerves have a blood supply (in the form of small arteries) running on their surface. When this blood supply is compromised, it results in weakness or paralysis of the muscles such that both eyes do not work together simultaneously. This is called a microvascular cranial nerve palsy, and results in double vision. [Please download the PDF file if you are unable to view the image below.]