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  1. Jury still out.

    Jury still out.
  2. Replies
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    Everyone should read The Varilux Epic of of...

    Everyone should read The Varilux Epic of of respect.

    it’s available used on Amazon and as a pay-for PDF:
    ...
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    Because some shapes—aviators to name one—have...

    Because some shapes—aviators to name one—have something my Dad called “automatic decentration”—meaning the minimum blank size needed to just cut out included extra decentration from the mechanical...
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    Datum system, which was well suited for the then...

    Datum system, which was well suited for the then current 1930s symmetrical, non-gendered lens shapes and frame styles that predominated before the rise of asymmetrical female/harlequine and aviator...
  5. What does it matter? Harm? No. ”Digital...

    What does it matter?

    Harm? No.
    ”Digital Eyestrain” as it’s colloquially defined? No.

    Increased perception of wearer comfort? Absolutely yes!

    Be careful what you pronounce with authority. Or...
  6. The central problem with most acetate frame bevel...

    The central problem with most acetate frame bevel grooves is that the frame front is milled flat.
    Then frame wrap is introduced, effectively moving the frame’s rear bevel groove shoulder further...
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    tell use more

    tell use more
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    Fea

    Fea
  9. In a counter intuitive way, often with poor...

    In a counter intuitive way, often with poor cosmetics—You coukd move the bevel apex extremely forward: This will often help avoid the splay.

    barry
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    Look no further than TC Charton B

    Look no further than TC Charton

    B
  11. Replies
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    1,042

    In the absence of coordinated, national optician...

    In the absence of coordinated, national optician licensure, the path forward is clear:

    1. Recognize the best/most important parts of legacy opticianry teaching
    2. Recognize the areas, such as...
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    46,904

    Yes, Certainly YMMV. B

    Yes, Certainly YMMV.

    B
  13. Replies
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    46,904

    As if the 15-17% overall remake is actually...

    As if the 15-17% overall remake is actually manageable or avoidable within today’s optical landscape.

    Respectfully, I see this as naive.

    B
  14. Because they’re bad of terrible quality...

    Because they’re bad of terrible quality materials. That’s why.

    B
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    There’s nothing “right” about it according to...

    There’s nothing “right” about it according to Wollaston or Ostwalt.
    B
  16. Replies
    228
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    40,040

    Sounds goods. But I implied nothing about wearer...

    Sounds goods. But I implied nothing about wearer comfort. Just accuracy of positioning

    B
  17. Replies
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    40,040

    If high accuracy is the goal, you’d never use a...

    If high accuracy is the goal, you’d never use a PD taken objectively with a ruler or via corneal reflection

    B
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    But if they look in any direction except straight...

    But if they look in any direction except straight ahead, the consequences apply.

    Now what?
  19. Replies
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    40,040

    Just what is so wrong with using a binocular PD?

    Just what is so wrong with using a binocular PD?
  20. Replies
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    1,625

    The older datum system was a more effective guide...

    The older datum system was a more effective guide when fitting a frame.
    the boxing system was a lab answer to non symmetrical shapes in the age of limited blank diameters .
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    434

    You must always balance Martin’s Rule against the...

    You must always balance Martin’s Rule against the impact of abbe when the panto is 8 degrees or more.

    B
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    If all opticals/docs were inherently ethical,...

    If all opticals/docs were inherently ethical, there wouldn’t be any laws.

    B
  23. Replies
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    3,458

    Yes. But I dont make the rules or determined the...

    Yes. But I dont make the rules or determined the DMV acuity screening thresholds. Many drivers see 20/40 and worse.

    But having no consequential data to crunch relating vision to accidents or even...
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    3,458

    I’m all with you on working together with ODs....

    I’m all with you on working together with ODs.
    just follow the law and tender them a copy of their Rx after the exam is done—not just upon request.

    That’s my essential “must have.”
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    Last time I checked, almost the entire world’s...

    Last time I checked, almost the entire world’s motor vehicle screening standards center on 20/40 acuity, which a +0.50 hit rarely surpasses.

    B
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