Vertical and Horizontal Decentration - Working with OC Heights

This week we continue our series on finishing layout work. All finishing work is based on lens movement within the frame eyewire opening. The most common movement is aligning the lens OC with the customer PD. We do this by decentering the lens. In this lesson we work through three examples of calculating decentration for simple monocular PDs, calculating decentration for an OC or optical center height and show how that is applied in a manual blocker. Optician training includes calculating lens shift for OC placement. Just as we did for our series on prism, finishing layout work will be covered in small, incremental “baby-steps” so students can easily build on prior knowledge.
Free in-office finishing course available at opticianworks.com/edge
Learn More: opticianworks.com
Connect with us:
/ opticianworks
This video was produced in association with 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: www.laramyk.com

[@halraines9]

I was an ABO/NCLE optician for many years and completed college to become a teacher. Loved the professions. Recently retired and looking at your videos, because I enjoyed opticianry. I appreciate your attention to details. When I learned we had a very small handbook and noodled through everything. Wow, you make the concepts easier to comprehend. Thanks for your approach. You are an effective teacher.

[@LaramyKOptical]

Thank you. As I mention in one of the videos, "I really miss the classroom." So glad I'm about to retire myself. Opticians have about 10 maybe 20 years left. Then you'll have a handful of "specialists" for the more complicated stuff and electronic devices handling all the rest.

[@tiebackcomics6902]

It's so helpful to see this concept explained on the white board, and then be shown how this information is used at the lab. The place I work doesn't do any "lab" work, so it's nice to see what's going on behind the curtains. Thank you!

[@LaramyKOptical]

Glad you liked it. Keep your fingers crossed - maybe where you work will get an edger one of these days! John

[@hirmaguma3367]

Prof Siegel, you are the best as usual ! Very helpful videos! Keep up your great job!

[@ruelquinonez8165]

Thank you sir I learn more from you please keep more videos 🙏

[@andrewlima7356]

Yes! Love the beep at the end. Hilarious

[@za9961]

Thank you so much

[@hungduong2628]

Verygood!

[@iMuayyad]

Thank you Sir

[@adenigbaraphaeladebayo7588]

Hi John... nice video. I want to know if it’s always important to work with oc height on single vision lenses or just the horizontal decentration will do. Thanks.

[@LaramyKOptical]

Adenigba, Most opticians will start requesting an OC height when power reaches +/- 4 and over. Much to consider - see OpticianWorks website. John

[@pedrolopez5071]

Como escucharlo en español ?

[@monicaarnedo5342]

ARGENTINA

[@juanisaza4756]

laught, i know the feeling i have a dog too. great video.

[@LaramyKOptical]

;-)

[@monicaarnedo5342]

buenas noche OC es la altura y "B" de donde sale ????

[@LaramyKOptical]

kzbin.info/www/bejne/hGi7oqelgtGfbqMsi=sj7EczL2E6rK0rqw

[@monicaarnedo5342]

Muchas Gracias!!!

[@joesmith5302]

Not to be a pill or anything, but is there such a thing as a monocular OC? Just curious. Your instruction style and presentation is the best, btw, sir. Also, I don't see a B number on my frames. How would I get that?

[@LaramyKOptical]

Sure you could do an OC height for each eye independently. Done all the time when fitting progressive lenses. B is not on a frame see: kzbin.info/www/bejne/hGi7oqelgtGfbqM

[@dannyblade6824]

The dog was trying to explain too John.

[@LaramyKOptical]

She has an opinion about everything.

[@dannyblade6824]

Laramy-K Optical don’t we all ... lol