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.
By definition, density is the. mass of an object divided by its volume (D=M/V). Although it is easy to determine the mass of an. object using scales, it is very difficult to determine the volume of an object that has an irregular. shape such as the human body. It is possible to measure the volume of the human body by.