It's very common for patients to develop hypoglycemia when they are being treated for diabetes. Severe hypothermia can cause fatigue and weakness. The lack of heat leads to a loss of energy as the body tries to conserve. By the time hypothermia is bad enough to cause fatigue, it is a severe medical emergency.
Zyl eyeglass frames Zyl is the most common plastic frame material because it can assume a large array of colors, textures and patterns. Temples and frame fronts can be cut from blocks of zyl extruded as a sheet of block acetate. Or, granular zyl can be liquefied and then injection molded.
Hybrid contacts are large-diameter lenses that have a rigid gas permeable central zone, surrounded by a peripheral zone made of soft or silicone hydrogel material. The purpose of this design is to provide the visual clarity of GP lenses, combined with wearing comfort that is comparable to soft lenses.