There are 3 different methods opticians, optometrists, and optical labs use for notating prism. There is the resultant notation, the 360 notation, and the 180 notation. This week we cover each of the three methods, describing when each is used, how to use them, and how to transform prism prescriptions between the various notations. | Laramy-K OpticianWorks
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Your Questions Answered: A common ABO question and a concept many people seem to struggle with; how to work prism problems with Prentice's Formula is also a common email question. If you've struggled with these problems at one point or another, this one's for you. | Laramy-K OpticianWorks
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If you have a job that requires prism and there is enough power in the lens, it may be possible to create the prescribed prism by simply moving the lens off-center, rather than going through the trouble and expense of having the lab create it for you. Let's take a look at what is required and how you would calculate the necessary movement to fill a prescription for prism by decentration. Note: This video was edited from the original post to add some related information on aspheric lenses. | Lara
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I’ve got a fever and the only prescription is more lensmeter! This week, learn how to recognize vertical imbalance using the lensmeter. This lesson includes reading the lens sphere power, cylinder power, axis. The video lesson will demonstrate how to recognize and read the prism of vertical imbalance vs. prism between two mounted single vision lenses. | Laramy-K OpticianWorks
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