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 (not to be confused with hardwood), also called high-density fiberboard (HDF), is a type of fiberboard, which is an engineered wood product.This product is also known under Isorel or Masonite brand names.nlike solid wood, hardboard is very homogeneous with no grain. A wood veneer can be glued onto it to give the appearance of solid wood. Other overlays include Formica, laminated papers, ceramics, and vinyl.