Bio-Medical Instrumenation Field of Vision is the term used for the measurement of vision or for the test used to measure exact vision. A person s uncorrected vision refers to the visual acuity without glasse or contactlenses.
The eye s optical system is very complex. For best vision, light must travel through an undistorted cornea, a normal lens and other clear media before reaching a healthy retina, connected to the brain by the visual pathway. We really see with our brain, not the eyes. When trying to understand this concept about vision, it s often best to think of the eye and brain, as a radio, where the eye is only the antenna of the radio, which gathers airwaves or signals for the radio electronics to perform and play music; the radio s signal processing power being analogous to one s brain.