We found this video on Youtube that explains it really well...
Whats the difference Standard Vs. Premium AR Coatings
Lens Coatings
1
Coatings on lenses block or reflect about 20% of harmful blue light from your eyes. Blue block Lenses actually block about 100% harmful blue light by absorbing it.
What's the difference between a Blue Light Coating and a Blue Block Lens?
Lens Coatings
2
Is it worth it? Yes! Does it last?
Is Anti-Reflective on My Glasses Worth It?
Lens Coatings
3
Digital Ray-Path Technology
Digital Ray-Path Technology
Lens Designs
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Office Progressive Lenses: What Are They Good For?
Lens Designs
1
Surface Power® is a lens technology that uses a pure geometrical method of calculation to produce lenses with optical performance similar to conventional progressive lenses, but with the advantages of the digital process, including flexible designs, variable corridor lengths, and insets.
Smart Add
Lens Designs
2
Are Polarized Lenses in Your Sunglasses Worth It?
Lens Types
2
Parts of a frame
Learn in detail about the Parts of a frame
Optician Info
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Understanding Frame Fit: A Basic Guide
Understanding Frame Fit: A Basic Guide
Optician Info
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Verification of Tolerance: Prismatic Imbalance or PDs and OC Heights
Optician Info
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Verification or Final Inspection of Frames and Lenses: Checking Tolerances and Standards
Optician Info
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Power Compensated, when the lens power does not match what you ordered.
Compensated Prescription Powers
Optician Info
5
The boxing system is used to measure eyeglass frames and lenses for sizing and finishing layout work. The primary boxing system measurements are the frame A, B, & DBL. The common frame sizing numbers like, 56-18 are determined using the boxing system. Accurate frame measurements are important for finishing work. Learn More: https://opticianworks.com/
Accurate frame measurements are important for finishing work. Opticians use the boxing system to size a frame for individual wearers. Opticians use the boxing system to measure frames to calculate lens decentration for optical finishing work or optical finishing layout. Other boxing system measurements include segment height or seg height, segment drop or seg drop and the geometric center of eyewire openings. Opticians use the boxing system as part of their daily work.