In 2007, researchers at the University of CaliforniaâDavis determined that our Solar System was fully formed at 4.568 billion years ago. They did this by determining the age of stony materials from the asteroid belt.
When to see a doctor. See your doctor immediately if you experience the signs and symptoms of migraine with aura, such as temporary vision loss or floating spots or zigzag lines in your field of vision. Your doctor will need to rule out more-serious conditions, such as a stroke or retinal tear.
1 Cataracts. 2  Cataracts may cause ghost images, usually in one eye only. 3  This is because the clouding of the eye's natural lens that sits behind the pupil can cause light rays to scatter in different directions, creating multiple but incomplete images, especially when you look at lights.