If you’ve have ever wondered what a compensated free-form lens design is and why the lens returned from the optical lab does not match the lens prescribed. Here’s your answer. It boils down the differences between the position of the lens in the wearer’s eyeglass frame and the lens in the phoropter or instrument used to determine the initial prescription. Watch to learn more. If you have any questions or liked this video, please let https://opticianworks.laramyk.com/ know.
When a lens is placed in front of the eye at varying angles and distances, the power of that lens perceived by the wearer also changes. When inserted into a pair of glasses, a lens does not sit immediately and squarely in front of the eye as the lens does in a phoropter when it is used to initially determine the prescription. There are changes in vertex distance, pantoscopic tilt, and face form or wrap angle. A compensated lens uses computer and digital lens surfacing technology to take into account these differences and calculate the exact lens power to the .001 of a diopter that will give the wearer a perceived lens power that matches the power in the prescription. This is why when an optician orders a compensated freeform lens design the power of the lens returned from the optical lab does not exactly match the power of the prescription.
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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