There are certain barriers to effective communication that every organization faces. These potential interruptions of the flow of information are referred to as noise. Communicative problems (i.e., noise) can be categorized into three groups: technical, semantic, or efficacy-related.
Polarized vs Non-Polarized Aviator Sunglasses. For most people wearing polarized sunglasses it simply helps reduce glare off windows, ice or water; however, for pilots using polarized sunglasses there can be a number of serious problems.
Contact Lenses. A soft contact lens is a hydrophilic (water loving) disc that floats on your cornea. Like prescription glasses, a contact lens is specifically shaped to focus light into the retina of your eye. But, unlike glasses, which you can see over and under, contact lenses cover your cornea, correcting your entire field of vision.