The cornea and lens in the eye act as the camera lens. The retina is similar to the film. If the image is not focused properly, the film (or retina) receives a blurry image. The cornea also serves as a filter, screening out some of the most damaging ultraviolet (UV) wavelengths in sunlight.
Hardie plank siding is a premium brand of cement board siding (also known as fiber cement board siding) produced by the James Hardie Company.ardie plank can be purchased with a wood-grain look, a plain smooth look or a stucco type finish. Hardie plank also comes in simulated cedar shingle planks.
Form[edit] The most common plank is the front plank which is held in a push-up-like position, with the body's weight borne on forearms, elbows, and toes. The arms should be directly under the shoulders, with the entire body in a straight line (from toes to head) and the back completely flat, neither arched nor rounded.