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.
Doctors want to know whether double vision involves one or both eyes and whether it is constant or comes and goes. They also ask whether the images are side by side or on top of one another and whether double vision tends to occur only when the person is gazing in a particular direction. Doctors ask about any pain, numbness of the forehead or cheek, facial weakness, vertigo, and swallowing or speech problems because these symptoms may indicate a cranial nerve problem.