A statement set forth by management of a firm or institution to set their goal(s) for the present and the future.
The ability to see, eyesight.
Perception of things through the action of light on the eyes and optic centers in the brain.
The ability to see provided by the eyes and brain working together. Light enters the eye through the cornea (the clear outer covering of the eye), which, along with the lens, focuses it on the retina (the light- sensitive layer at the back of the eye). The retina contains nerve cells known as rods and cones that respond to different aspects of light. Cones perceive color and are sensitive to detail. Rods are insensitive to color, but very responsive to dim light and movement. Since the retina has many more rods than cones, the eye can see even in darkness, but it perceives color and detail best in bright light.
The ability to see. When light rays enter the eye, the primary focus occurs within the cornea, although the eye also possesses accommodation—a natural mechanism for fine-tuning focus—achieved by adjusting the lens curvature. These combined systems create an image on the retina. Within the retina, light-sensitive rod and cone cells transform the image elements into nerve signals that travel through the optic nerves to the visual cortex of the brain. Rod cells, more prominent at the retina’s edges, are highly responsive to light but not to color. On the other hand, color-sensitive cone cells are concentrated more centrally in the retina.
The brain orchestrates motor nerve signals directed to the six small muscles responsible for moving each eye, ensuring their alignment. Precise alignment enables the brain to merge the images received from both eyes. However, since each eye perceives a slightly distinct view of an object, the brain gathers data that translates into a sense of solidity and depth. This form of stereoscopic vision plays a crucial role in accurately assessing distances.