Period Costs. Period costs are expenses that are easier to attribute to times and accounting periods than actual production processes or finished goods. Typically, managerial accountant want to classify expenses in categories that can improve operations. Manufactures tend to focus on functional classifications.
The amber color of these impact-resistant polycarbonate lenses block short-wavelength blue light and 100% of ultraviolet (UV) light, thus providing additional protection against cataract formation and the development of macular degeneration, while increasing contrast on both sunny and bright hazy days.
1 Consider photochromic or polarized lenses. 2  Photochromic lenses, like sunsync â¢ lenses, change from clear to dark automatically when exposed to UV rays. 3  Polarized lenses reduce or eliminate glare and reflections from the sun. 4  You can have coatings added to both lenses to block 100% of UV rays as needed.