Keratoconus (KC) 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.
On the plus side Hardie Board is primarily made of concrete. It is a fibrous concrete board that termites don't eat. This is good news for warmer climates where termites stay active most of the year. Hardie siding is also impervious to moisture. You can put it in a pail of water and leave it for as long as you like and it will not become saturated.
We installed Hardie Plank Evening Blue on the house. They put on the matching caulking and it look great but ONLY for a few months. Each and every one of the seams is discoloring. Now I have a house with brand new siding looking like bird poo all over.