Morning blues: Morning sickness is not just experienced by pregnant women, but can be caused by a number of factors in all people Sleeping itself can also be the cause of morning sickness. People who suffer from sleep apnoea, a condition that can cause you to stop breathing during the night, can wake in the morning feeling unrested and nauseous.
The History of Safety Glasses. Safety glasses should be worn by personnel in manufacturing, construction, medical, some service industries and sometimes sports. Although eye injury is a higher risk for these individuals, many people do not wear eye protection for one reason or another.
It must also be able to withstand being dropped, or set down roughly. Thus, glass is not a good option for a watch cover. Though glass provides a transparent view and lovely finish, it is not very durable. Rolex has combated this issue, using two varieties of crystals over the years in the production of their famous, luxury watches. Up until the late 20th Century, most watch crystals were actually acrylic like the one in the image above.