What Is Decentration?

This week we begin 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. 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

[@zn6761]

This is a very simple explanation, Thanks John!

[@ferencjuhasz5583]

Laramy-K is one of the best optician, and a really good teacher.

[@autumndavis7605]

Thank you very helpful as a reminder for layout work for the finishing lab!! Thanks again.

[@dellaoptique8255]

Thank you for your excellent videos ! You make difficult concepts easy to understand .

[@adityapratama4095]

Thanks to you Mr. Seegers and laramy K.
this video was helpfull.

[@izzatlaiwalla96]

V informative!! Clears many confusions

[@judalexa]

Excellent explanation! Thanks

[@nadz.s9212]

thank you.now im more clear after the explaination.thumb up

[@tru2nay142]

THANK YOU SO MUCH!! I have a test coming up and I didn't get what the IN & OUT meant but your visual really cemented the info in my head

[@62ivleenayogi72]

Very helpful. Thanks a lot!!

[@SS-mj7zq]

Of course understood it.. Thanks

[@special_touch1734]

Thank you for teaching

[@NoneMechanic101]

Very well done

[@widiastutiekowulandari8511]

Nice , many thanks

[@sakinamasud5392]

Nice and clear

[@gira110]

so great

[@gazaltabrizipour6316]

LOVE THE ENDING! lol :)

[@LaramyKOptical]

Thanks, Andy! ;)

[@raheembarakat9936]

Thank you sir

[@sunshine.a3452]

Thank youuuu

[@aeen64]

u r The best

[@indrajitpaul2931]

Sir, can you tell me how can i solve power variation in a lens?

[@besoftcool]

Sir please tell me how to mark angles & near sight or bifocal lenses

[@user-ul5pe5dz2w]

Great

[@samdcuza7343]

Nice video sir
Make video on jcc

[@juanmejias5618]

@Laramy-K Optical Thanks so much for the video! Can the decentration be negative in the MBS formula?

[@LaramyKOptical]

Juan, I'd think that movement away from the center is movement away from the center. If you happened to have 3 out instead of 3 in I'd just use 3. John

[@juanmejias5618]

Laramy-K Optical Noted. Thanks for the feedback!

[@RaashadGamerDude]

Can you do a video or the glasses adjusted please love your videos🙏🏽👂🏽

[@LaramyKOptical]

Chris, I do cover standard alignment in a video that is on the website. Videos on the adjustments made for individual wear are on the list but no idea on a release date. My biggest problem is lack of a "dispensing" area to shoot them. Anyone have a shop within 60 or so miles of Anderson SC they would like featured in a video series? John

[@amiriftikhar3221]

Hey john,
I was seeking your advise on the centre difference in y-axis, as this video shows decentration on x-axis. What if there is centration issue along both x and y axis?

[@LaramyKOptical]

We call decentration movement along the 0-180 to align the lens OC with the pupil horizontally. We call movement along the 90 or vertical an OC placement or OC height. Same movement as you would use for blocking a progressive on the fitting cross. See: czcams.com/video/urNNLrnWL1o/video.html

[@amiriftikhar3221]

@@LaramyKOptical thankyou,
It was very helpful.

[@rameshmaurya4883]

Can you w explain about the Total Decentration . Thank you

[@gazaltabrizipour6316]

He did...

[@machak7763]

With larger frames , optical centre's should be decentred vertically as well as horizontally because the optical axis of the lens should correspond to the centre of rotation of the eye what cosmetic problem does this cause

[@LaramyKOptical]

The eye is far less sensitive to the vertical placement of the OC than the horizontal. In reality as long as they are both on the same plane it rarely matters. An OC bump is a fine idea but keep it to a minimum (around 5mm). If powers are high enough that it matters (+/-7 and higher) then you should just pick a better frame. The cosmetics can get ugly with thickness becoming an issue both temporally and in the vertical up at the eyebrow or cheek.

[@thelordknowsaboutit]

How did you get 66FPD

[@LaramyKOptical]

czcams.com/video/N7XqtoMll8A/video.html

[@williambaldwin9346]

Ummmm I think I am in the wrong Decentration video, this is not Piaget's psychological theory of development.

[@LaramyKOptical]

That's next door in Room 564. Thanks for stopping by though...