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.
Metric Units of Mass. Mass is the amount of matter that makes up an object. Gram (g) is a metric unit used to measure the mass of small objects. Kilogram (kg) is equal to 1,000 grams, so it is used to measure the mass of larger objects.A paperclip has a mass of about 1 gram.ou can change from grams to kilograms by dividing. 5000 g = ___ kg Think: 1000 g = 1 kg 5000 divided by 1000 = 5 5000 g = 5 kg Remember: To measure an object that has a small mass, use grams. To measure an object that has a larger mass, use kilograms.