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.
In contrast, much less is known about the potential long-term side-effects of neonatal blue-light phototherapy (NBLP). Many of the data that are currently available on how NBLP influences melanocytic naevus (MN) development are controversial.BLP is at present the mainstay of treatment for neonatal jaundice, but in the future greater consideration should be given to its long-term side-effects when phototherapy is indicated.