None of these new petroleum products are true distillates, they are extracts and creations of the petroleum engineers gluing bits and pieces of hydrocarbon molecules from the refinery waste stream together to make useful, salable products.
The Causes of Double Vision. Double vision, or diplopia, occurs when your eyes donât work as a team. When your visual system is working correctly, both eyes should point in the same direction at an object. Your eyes see two different images, which your brain combines to produce a single, 3D image.
Now, focus on something unmoving in your field of vision -- a window or a tree. 1  Are the two objects side by side, or is one on top of the other? 2  Are both images clear but simply unaligned with each other? 3  Cover one eye, then uncover it and cover the other. 4  Pretend your field of vision is a clock face. 5  Tilt your head to the right, then to the left. If the nerves controlling the eyes are damaged, double vision can result. 2  Guillain-Barre syndrome is a nerve condition that causes progressive weakness. 3  Sometimes, the first symptoms occur in the eyes and cause double vision.