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(playful extraterrestrial signal music) (upbeat music) - Hello, I would like to welcome you to the Laramy-K OpticianWorks training center, where today, we are going to talk about taking a ordinary lens order with a distance power and an add, and converting that to an intermediate single vision pair of glasses. Last time we got together, we talked about creating a single vision mirror repair. This time, were gonna talk about creating a single vision intermediate. The formula, if you will, or the rule is you add your sphere power and half of your add power to create an intermediate power lens. The normal range for add powers run from one to three, plus one to plus three, in quarter diopter steps. If Im taking half of 1.00, 1.50, 2.00, 2.50 or 3.00, well, thats great because youll see as you take your calculator and divide those by two, you end up with a nice quarter diopter step, which is what were familiar with. Its not so great when you take 1.25, 1.75, 2.25, or 2.75 because the