All PCE certifications are on the American Nurses Credentialing Center (ANCC) Magnet Recognition ProgramÂ® list. PCEâs certifications recognize excellence in the specialty role of the nurse educator. Prepared Childbirth Educators, Inc., 219 Central Avenue, Hatboro, PA 19040 | 888-344-9972.
Infrared radiation is used in industrial, scientific, and medical applications. Night-vision devices using active near-infrared illumination allow people or animals to be observed without the observer being detected.
Whereas humans are able to see more vibrant colors during the day, their feline companions have the edge when it comes to peripheral vision and night vision. [Images: See What a Cat Sees] Night creatures. Cats have a wider field of view â about 200 degrees, compared with humans' 180-degree view. Cats also have a greater range of peripheral vision, all the better to spot that mouse (or toy) wriggling in the corner. Cats are crepuscular, meaning they are active at dawn and dusk. That may be why they need such good night vision. Their eyes have six to eight times more rod cells, which are more sensitive to low light, than humans do. In addition, cats' elliptical eye shape and larger corneas and tapetum, a layer of tissue that may reflect light back to the retina, help gather more light as well.