Scleral lenses have gained popularity in the last decade. From a lens with limited viability for over 100 years to the fastest growing segment of the gas permeable lens market, scleral lenses have come a long way.
Mass and Weight. The mass of an object is a fundamental property of the object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object. Definitions of mass often seem circular because it is such a fundamental quantity that it is hard to define in terms of something else.
Mass: Mass is a measurement of the amount of matter in a sample; fundamentally, it is a. measurement of how much influence gravity has on the sample. In the metric system, mass is. measured in grams (g). Mass is determined in the lab by using an electronic scale; the scales that we. will use are accurate to 0.001 g.