Sometimes, the glasses themselves are responsible for causing the headache. If you wear glasses and find that you experience headaches on a regular basis or even once in a while, take the time to investigate why it may be happening, because wearing eyeglasses shouldnât cause you any pain.
coÂ·heÂ·sion. n. 1. The act, process, or condition of cohering: exhibited strong cohesion in the family unit. 2.
Covalent bonds are forces that hold atoms together. The forces are formed when the atoms of a molecule share electrons. You will learn more about the chemistry of covalent bond formation when you take Chemistry 1. For biological purposes there are several things to remember about covalent bonds.