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.
Polycarbonate and Trivex Lenses are both materials for you to choose from when it comes to glasses. Anyone who wears glasses knows the difficulty of certain activities is increased because you must keep your glasses on your face while active.rivex Lenses. Trivex lenses are made from a lightweight, impact-resistant material. It was developed in 2001 by PPG Industries as an alternative to polycarbonate. Trivex lenses are made from a urethane-based monomer.