What is Minimum Blank Size (MBS) and How Do You Calculate It

A lens blank must be large enough to be cut to fit a specific frame while also allowing for decentration. The larger the frame and the more decentration required, the larger the uncut lens blank that will be required. The MBS or minimum blank size calculation lets you get a good estimate on the blank size that will be required to get proper lens cutout. Watch and work through the calculations to determine lens minimum blank size or MBS

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This week we work through the calculation to determine lens minimum blank size. A lens must be large enough to be cut to fit a specific frame while also allowing for decentration. Opticians use MBS when doing optical lens finishing work. The larger the frame and the more decentration required the larger the uncut lens blank that will be required. Optician training includes calculations for lens finishing and lens minimum blank size. The MBS or minimum blank size calculation lets you get a good estimate on the blank size that will be required. MBS applies to both finished uncut lenses and surfaced lenses. Opticians will use MBS when ordering stock lenses to fill eyeglass prescriptions and when working with their wholesale optical lab.
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This video lesson is sponsored by Laramy-K Optical

Laramy-K Optical is a digital uncut and coating lab unlike any other. The only exclusively uncut lab in the country; we provide our customers with independent, high-end alternatives to corporate brands. Through craftsmanship, technology, and independent, innovative vendors like Younger, IOT, A&R, and Quantum Innovations we offer our customers the Integrity portfolio of freeform lenses and coatings. Made in the USA, the Integrity brand is not a generic house-brand, but is the absolute best available, designed to give the wearer that “wow!” experience.

In addition to the digital line, we still offer conventional surfacing, including glass. Maintaining traditional equipment gives our customers vastly more flexibility in their dispensing, particularly when it comes to more difficult prescriptions.

Learn More: http://www.laramyk.com

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