Hand made sunglasses Italian Acetate frame: The acetate we use is a mix of cotton fibre and wood pulp. CR-39 lens: "CR-39" is an abbreviation of Columbia Resin 39. CR3-9 has the highest Abbe value of any lens. An Abbe value defines the chromatic aberration of material, and this effect is generally more noticeable in peripheral vision than when looking through the center of a lens. Lens Category 3: Category 3 in lenses, is considered better than categories 2 & 1. This is because they provide…