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  1. It would increase aberration off-axis. "Best...

    It would increase aberration off-axis. "Best form" or "corrected curve" lens shapes ideally have about the same vision at the center as in the periphery, as the eye tracks across the lens.
    ...
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    Ry Cooder and Pigalotti - Pigfoot Shuffle 1989 ...

    Ry Cooder and Pigalotti - Pigfoot Shuffle 1989


    https://www.youtube.com/watch?v=JvLkt_0dPP8
  3. Wearing my contrarian hat: Plastic photochromic...

    Wearing my contrarian hat: Plastic photochromic lenses are very clear inside of a non-convertible vehicle on a sunny day, and turn very dark when outdoors on a drizzly, overcast, winter day.
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    No eyeglasses for you. Robert

    No eyeglasses for you.

    Robert
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    Peter, Paul and Mary - Leaving on a Jet Pane...

    Peter, Paul and Mary - Leaving on a Jet Pane ~1966

    Some off to university or work, others to war. Not the best of times for the latter.


    https://www.youtube.com/watch?v=UF2ZOBG0_N8
  6. Zeiss might work out if you cut the cylinder to...

    Zeiss might work out if you cut the cylinder to -6.00 DC (sph eqv the difference). Obviously very frame dependent. Both sides surfaced in Germany.

    ZI2_FitDisp_Guide_051012FNLAppd.pdf

    Best...
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    Younger's variable base curve blank addresses...

    Younger's variable base curve blank addresses most of our concerns with moderate/high plus in conjunction with moderate/high adds.

    http://camberlens.com

    Best regards,

    Robert Martellaro
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    Fendertones - Monkey's Uncle 2011 ...

    Fendertones - Monkey's Uncle 2011


    https://www.youtube.com/watch?v=t3hVqPhlMMw

    https://www.youtube.com/watch?v=oRTlfFlJ4o8
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    Alice Cooper - Black JuJu 1971 √ Full moon √...

    Alice Cooper - Black JuJu 1971

    √ Full moon
    √ Lanterns lit
    √ Black Juju


    https://www.youtube.com/watch?v=GwFxXl11GDU
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    I just got off the phone with them on the first...

    I just got off the phone with them on the first try (1:00pm CDT).

    Dial 800.847.9357.

    From the menu select #1 (customer service).

    Robert
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    Paul McCartney - Magneto & Titanium Man 1976 ...

    Paul McCartney - Magneto & Titanium Man 1976


    https://www.youtube.com/watch?v=5YgD95tmWoQ

    Reprise with Black Cat and Spider-Man


    https://www.youtube.com/watch?v=gHz_7e7yluM
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    https://www.winoptical.com/Uploads/page-files/docu...

    https://www.winoptical.com/Uploads/page-files/documents/module/Glare-Control/Glare-Control-patient-brochure.pdf
    ...
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    Antoine Boyer & Daisy Castro - Souvenir de...

    Antoine Boyer & Daisy Castro - Souvenir de Villingen 2011


    https://www.youtube.com/watch?v=Z08PhRon2JE&feature=emb_rel_end
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    John Prine - Dear Abby 1973 ...

    John Prine - Dear Abby 1973


    https://www.youtube.com/watch?v=EF8S5XB-eYs
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    Stanley Jordan - Eleanor Rigby ~1990 I can...

    Stanley Jordan - Eleanor Rigby ~1990

    I can usually tell who the players are when they can show speed and feeling without distortion and other effects.

    Here is another "tapper", and like...
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    Vittorio Camardese 1965 Submitted for your...

    Vittorio Camardese 1965

    Submitted for your approval.


    https://www.youtube.com/watch?v=UmTQYquqxSY
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    Bettye LaVette - Blackbird 2012 Con passione....

    Bettye LaVette - Blackbird 2012

    Con passione.


    https://www.youtube.com/watch?v=vll9Iv6PaKI
  18. My wife noticed I've been referring to RBG as RGB...

    My wife noticed I've been referring to RBG as RGB when discussing Ginsburg lately. Does that mean I'm slipping away?

    Robert
  19. Yes. Probably not, due to habitualization....

    Yes.



    Probably not, due to habitualization. CL wearers might have difficulties, along with changes from magnification and convergence effects.

    Most of your concerns are addressed in this...
  20. Yup, Prentice's rule is not dead-on balls...

    Yup, Prentice's rule is not dead-on balls accurate for oblique angles of view, and certainly doesn't take into account higher orders of aberration (3rd?), just as best form theory breaks down over...
  21. Brent, The formulas I've seen make no mention...

    Brent,

    The formulas I've seen make no mention of thickness, but then at our level (ophthalmic dispensing) .01∆ of Transverse Chromatic Aberration is, practically speaking, inconsequential...
  22. I'm not aware of any direct correlation between...

    I'm not aware of any direct correlation between thickness and dispersion, at least with ophthalmic lenses.

    Generally, higher refractive index lenses have greater levels of dispersion.

    Perhaps...
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    It's a Beautiful Day - White Bird 1970 Escape...

    It's a Beautiful Day - White Bird 1970

    Escape from doomscrolling and apocalypse prepping. Heroin optional.

    ...
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    Destructive interference. Where does the...

    Destructive interference. Where does the cancelled energy go? Through the lens, increasing light transmission, satisfying the conservation of energy law.
    ...
  25. My books are at the office, so from memory: ...

    My books are at the office, so from memory:

    1) Our eyes/orbits are angled down slightly, maybe so that our ancestors didn't walk over cliffs!
    2) We tend to lower our gaze when focusing on near...
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