Optician Training: How To Use The 30 45 60 Rule To Determine Lens Powers In Oblique Meridians
110.6 هزار بار بازدید -
8 سال پیش
-
The 30/45/60 Rule: Learn to
The 30/45/60 Rule: Learn to estimate the percent of the cylinder value present 30°, 45° and 60° away from a lenses two principle meridians.
Learn More: https://opticianworks.laramyk.com/
The 30/45/60 Rule:
For optician training or ABO NOCE study: The primary or principal powers of a sphero-cylinder lens are 90° apart. The lens is either building in power or losing power between those two meridians. The difference in power between the two is the cylinder value of the lens. By using the 30/45/60 rule you can estimate the power in the meridian that is 30° 45° and 60° away from either of the two principle meridians. Since 90° represents 100% of difference between the two: 30° away you have 25%, at 45° away you have 50% and 60° away you have 75%. The lesson includes a bench session where we closely examine a sphero-cylinder lens marked with its two principle meridians. The whiteboard session works through three step-by-step examples.
Connect with us:
Facebook: opticianworks
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
Learn More: https://opticianworks.laramyk.com/
The 30/45/60 Rule:
For optician training or ABO NOCE study: The primary or principal powers of a sphero-cylinder lens are 90° apart. The lens is either building in power or losing power between those two meridians. The difference in power between the two is the cylinder value of the lens. By using the 30/45/60 rule you can estimate the power in the meridian that is 30° 45° and 60° away from either of the two principle meridians. Since 90° represents 100% of difference between the two: 30° away you have 25%, at 45° away you have 50% and 60° away you have 75%. The lesson includes a bench session where we closely examine a sphero-cylinder lens marked with its two principle meridians. The whiteboard session works through three step-by-step examples.
Connect with us:
Facebook: opticianworks
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
8 سال پیش
در تاریخ 1395/12/05 منتشر شده
است.
110,688
بـار بازدید شده