Keratoconus is a disorder of the eye which results in progressive thinning of the cornea. This may result in blurry vision, double vision, nearsightedness, astigmatism, and light sensitivity. Usually both eyes are affected. In more severe cases a scarring or a circle may be seen within the cornea. While the cause is unknown, it is believed to occur due to a combination of genetic, environmental, and hormonal factors. About seven percent of those affected have a family history of the condition. P
Hardscape refers to hard landscape materials in the built environment structures that are incorporated into a landscape.his can include paved areas, driveways, retaining walls, or any other landscaping made up of hard wearing materials such as stone, concrete etc. as opposed to softscape, the horticultural elements of a landscape. From an urban planning perspective, hardscapes can include very large features, such as paved roads.
Hardboard output in 2005. Hardboard, also called high-density fiberboard (HDF), is a type of fiberboard, which is an engineered wood product. It is similar to particle board and medium-density fiberboard, but is denser and much stronger and harder because it is made out of exploded wood fibers that have been highly compressed.