Contact lens design

Discussion in 'Contact Lenses' started by Helpful person, Jul 20, 2007.

  1. Can anyone point me towards references regarding the design of contact
    lenses? I am interested in the complete product from optical design
    to materials to biology.

    Are there any useful books or landmark papers?

    www.richardfisher.com
     
    Helpful person, Jul 20, 2007
    #1
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  2. Helpful person

    CatmanX Guest

    why?
     
    CatmanX, Jul 22, 2007
    #2
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  3. Helpful person

    otisbrown Guest

    X-No-Archive:

    Dear Helpful Person,

    I regret to inform you that you will get a lot
    of un-helpful remarks from Dr. (CatMan) Grant.

    I would suggest using Google -- better than Catman,
    and more reasonable.

    Otis
     
    otisbrown, Jul 25, 2007
    #3
  4. Helpful person

    Neil Brooks Guest

    Oh, Otis. Here's one of your basic problems: you think that
    unfiltered content found on the internet is more valuable than the
    opinion of a gruff optometrist with multiple degrees, fellowships, and
    decades of clinical experience.

    Most people wouldn't.

    You shouldn't either.

    You're usually unfailingly polite, but insane. See what I mean?
     
    Neil Brooks, Jul 25, 2007
    #4
  5. Helpful person

    Neil Brooks Guest

    Other than my previous answer: "He could be both," I have an idea
    here.

    Otis MAY be referring to the monkey studies in which ONE SPECIES of
    macaque monkey ... that DID NOT NEED corrective lenses ... had them
    SUTURED to its eyes.

    Over time, THAT ONE SPECIES of macaque DID adapt to the new lens.

    However, OTHER SPECIES OF MONKEY DID NOT PRODUCE THE SAME result in
    the same tests, AND even short periodic BREAKS FROM THE UNNECESSARY
    LENSES ELIMINATED THIS EFFECT.

    The takeaway from this is simple: if you have a particular species of
    macaque (a monkey), and it sees 20/20, DO NOT SUTURE LENSES TO THEIR
    EYES (I actually think it's unreasonable to suture lenses to anybody
    or anything's eyes, but....).

    So ... maybe Otis is simply an idiot (different from "stubbornly
    ignorant") and cannot understand the error of his ... um ...
    "thinking."

    Just another shot in the dark....
     
    Neil Brooks, Jul 25, 2007
    #5
  6. Helpful person

    Dr Judy Guest

    Rigid or soft? You haven't any received any useful replies to date,
    so I thought I would take a stab at it though my knowledge here is
    limited.This forum is populated by mostly by people who use the end
    products, not the engineers who developed them. You might have more
    success in posting to chemical engineering or industrial design
    forums, if they exist.

    Rigid lenses started as molded scleral lens in the 1920s, moved to
    smaller intrapalpebral fit in the 1950s, material was PMMA until the
    early 1970s with the first gas permable. Design and materials
    exploded in the 1980s with computer assisted lathes and multiple
    materials. Many are patented or "in house" industrial secrets, don't
    know if details were published.

    Soft lens design and materials started in the 1960s, most design and
    material development was inside contact lens companies so again,
    details may not be published.

    If you are near an Optometry School, you could try their libraries.
    Most contact lens texts have a chapter or two on design and materials
    and you could then explore the references for those chapters. The
    physiology of the cornea is usually well explored in contact lens
    texts.

    Dr Judy
     
    Dr Judy, Jul 25, 2007
    #6
  7. Helpful person

    otisbrown Guest

    X-No-Archive:

    Dear Judy,

    Thanks for being a helpful-person.

    Tragically these other shit-heads are more interested
    in attacking my advice (to check Google), than
    in PROVIDING ANY HONEST ANSWER TO THE
    ORIGINAL POSTER.

    When I ask honest questions about the dynamic
    nature of the fundamental eye -- I expect an
    honest answer. I doubt that you will
    get even an ATTEMPT at an honest,
    well thought-out answer from these people.

    Just one man's opinion.

    Otis
     
    otisbrown, Jul 26, 2007
    #7
  8. Helpful person

    Neil Brooks Guest

    And thank YOU for being a harmful person.
    YIKES!

    I can't speak for anybody else here, but ... OUCH! That really
    stings.

    Wow.
    Cautioning people about the worthlessness of, or harm to be derived
    from, your posts is valid and important advice.
    In theory.

    In practice, however, you do NOT ask such questions and you CERTAINLY
    do not ANSWER questions. These, for example:

    www.nbeener.com/NDB_OSB_Qs.txt

    Worse, you continue to lie, misquote, and scurry away to your personal
    soapbox to falsify other people's statements here.
    No, Otis. That's only true of you. If somebody can be warned not to
    listen to you, then ... preventing harm IS doing good.

    You hurt people.

    You don't care.

    You may be mentally ill, have diminished capacity, simply be a
    sociopath, or any and all of the above.

    But you hurt people.
     
    Neil Brooks, Jul 26, 2007
    #8
  9. Judy,

    Thanks for giving the only reply on topic. I am presently interested
    in all forms of modern contact lens design. I have found a limited
    amount of useful information on line but am looking for as much modern
    detail as possible. Although not optomistic about finding it on this
    forum I consider it still worth trying!

    www.richardfisher.com
     
    Helpful person, Jul 28, 2007
    #9
  10. Helpful person

    CatmanX Guest

    Why are you interested and why do you feel the need to post it on the
    net?

    You haven't found out much because you haven't even begun looking in
    the right places.

    Try reading some books. There is all the information you need. It is
    really not so difficult.

    dr grant
     
    CatmanX, Jul 28, 2007
    #10
  11. No need to be rude. If you had bothered to read my original post you
    would have discovered that I was asking for pointers to the best
    books. If you are so against people asking for help on the internet
    then why are you reading these posts?

    www.richardfisher.com
     
    Helpful person, Jul 29, 2007
    #11
  12. Helpful person

    otisbrown Guest

    Subject: About Richard.

    Check his web site. He probably has more optical
    design ability -- than you ever will.

    Why not respect Richard's honest questions with
    respectful answers?

    After all -- he did not insult you.
     
    otisbrown, Jul 29, 2007
    #12
  13. Helpful person

    p.clarkii Guest

    Otis,
    Please go away.
    YOU are not being a helpful person. To you, a contact lens is but
    another method to provide "the wretched minus", or "the quick fix",
    whichever you prefer.
     
    p.clarkii, Jul 29, 2007
    #13
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