Well, there are various reasons can cause double vision, such as brain injury, orbital fracture, cataracts or eye muscle disorder. Besides, in order to push blood through our circulatory system, the heart needs to exert a specific amount of pressure in our body. While, hypotension, so-called low blood pressure, will occur when the pressure slumps to levels below normal levels. As a result, side effects resulting from low blood pressure in our body may affect the functions of our eye muscle. Furthermore, it is worth mentioning that low blood pressure is likely to cause double vision. I mean, it usually leads to a blurred vision, what is worse than that, you may develop condition like shock. Avoid worsen the condition into some irreparable damages, you need to see a doctor, especially the low blood pressure is attributed to the certain medications, emotional stressors, Parkinson's disease or dehydration.