Vision (Definition) Vision is a feature of a person's brain that allows him to see. He must have normal eyes, optic nerves (that stretch from the eyes to the back of his brain), and visual cortex (the vision center in the brain), in order to see properly. An ophthalmologist is a doctor specializing in vision. ...Read more.
The halogens or halogen elements (/ËhÃ¦lÉdÊÉn, ËheÉª-, -loÊ-, -ËdÊÉn/) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117 (ununseptium) may also be a halogen.
PCP (angel dust), Ketamine (an anesthetic), and DXM (the active ingredient in cough syrup) are commonly classified as dissociative anesthetic hallucinogens. A dissociative hallucinogen is a drug, which reduces (or blocks) signals to the conscious mind from other parts of the brain.t is the drug most commonly identified with the term hallucinogen and the most widely used in this class of drugs. It is considered the typical hallucinogen, and the characteristics of its action and effects apply to other hallucinogens.