Vision is a broader term than visual acuity or eyesight. In addition to clarity of sight or simply a description of the ability to see, the term "vision" all interactions between the eyes and the brain, and all neurological processes that take place in the brain to make the sense of vision possible. http://windsofwinter.org/vision-20-review/
Blood pressure is a measurement used in medicine. In the body, the arteries carry blood away from the heart. As blood travels through the arteries, it presses against the walls of the arteries. http://www.topketodietreviews.com/bp-zone-supplement-reviews/