DIY CCTV magnification for the visually impaired

Discussion in 'Optometry Archives' started by zulu, Oct 14, 2008.

  1. zulu

    zulu Guest

    I need guidance/info/advice/ideas etc. etc on a portable system that can be
    used around the home for tasks such as reding letters or magazines, hobbies,
    simple repair tasks and the like.

    what camera/lens combo, what to use for a screen, how large a (12v?) battrey
    to power it all?

    Where do I start? (!)

    TIA
     
    zulu, Oct 14, 2008
    #1
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  2. http://www.abvi.org/services.html
     
    Scott Seidman, Oct 14, 2008
    #2
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  3. zulu

    zulu Guest

    zulu, Oct 14, 2008
    #3
  4. zulu

    Dan Abel Guest

    The standard for portability and light weight is a plastic fresnel lens:

    http://scientificsonline.com/search.asp?t=ss&ss=fresnel&x=11&y=9

    If you have sufficient light, they require no electricity at all. If
    you don't have enough light, just turn on a house light.

    Be sure to click all the links to see low vision aids and lenses mounted
    on stands (some have lights built in).

    I carried the US$1.95 lens around everywhere with me. It came in a
    plastic sleeve to protect from scratches, and it fit in my pocket
    calendar that I carried in my shirt pocket. Since then, due to age and
    cataract surgery, I have become totally dependent on reading glasses, I
    carry at least one pair at all times (outside of the house, in the house
    I keep a pair by the computer and another pair next to the couch where I
    read), and sometimes as many as three.

    With the price of fresnel lenses, you can afford to try these, and if
    they don't work for you, you haven't lost much.

    Have you tried plain old OTC reading glasses? They don't work for some
    kinds of low vision, but they are ideal for me. Some people buy them at
    the dollar store! If they work, but you don't like the frames, you can
    upgrade to the "expensive" ones (generally under US$15). If you have
    other problems, like astigmatism or you need different powers for each
    eye, then any eye doctor will be happy to sell you prescription glasses
    that will fit both your eyes and your face perfectly.
     
    Dan Abel, Oct 14, 2008
    #4
  5. zulu

    zulu Guest

    Thanks, but my eyes are beyond help from lconventional ow magnification.
    I cannot even see the Snellens chart, never mind the top letter on it.

    CCTv is the only way now....
     
    zulu, Oct 14, 2008
    #5
  6. Did you find a phone number??
     
    Scott Seidman, Oct 14, 2008
    #6
  7. zulu

    Dr Judy Guest



    You really need to consult a low vision centre who will have many
    different ready made devices available to demonstrate for you. Which
    one depends on the nature of your vision loss.

    Building your own CCTV does not make sense, there are good low cost
    systems available and you may qualify for government subsidy on the
    cost.

    http://www.lighthouse.org/

    http://www.shoplowvision.com/SearchByCategory.aspx?CategoryCode=56

    Judy
     
    Dr Judy, Oct 15, 2008
    #7
  8. zulu

    The Real Bev Guest

    Husband tried making one for his mom. The big problem is how to move
    the reading material so that you can read normally. Some sort of
    mechanism to move stuff smoothly from left to right and then CR to the
    beginning of the next line. Without that it's useless.
     
    The Real Bev, Oct 15, 2008
    #8
  9. zulu

    frank boyden Guest

    Hello,

    I am an account manager at Independent Living Aids in Jericho New York
    (www.independentliving.com). We supply the items you are interested
    in. Right now i have a special on Journey CCTV's.

    516-450-3823
     
    frank boyden, Oct 15, 2008
    #9
  10. zulu

    frank boyden Guest

    Hello,

    I am an account manager at Independent Living Aids in Jericho New
    York. We carry all th products that have been discussed and i would
    be happy to help.

    516-450-3823
     
    frank boyden, Oct 15, 2008
    #10
  11. zulu

    zulu Guest

    No offence Frank, but how can the price of these devices be justified?

    e.g. your *Journey*:

    http://www.independentliving.com/prodinfo.asp?number=999857DS

    This is around 1600 pounds sterling (I am in the UK)

    WOW

    Don't feel picked on BTW, all the commercially available units that I can
    find online seem to be overpriced by a factors of 2x or 3x

    This is precisely why I want to go down the DIY route (with some help from
    normally sighted friends).

    --

    ¦zulu¦ VIP



    Hello,

    I am an account manager at Independent Living Aids in Jericho New York
    (www.independentliving.com). We supply the items you are interested
    in. Right now i have a special on Journey CCTV's.

    516-450-3823
     
    zulu, Oct 15, 2008
    #11
  12. zulu

    The Real Bev Guest

    Exactly right. Suitable cameras, monitors and computers are dirt cheap
    -- if you're lucky you can retrieve them from somebody else's garbage!
    The problem is the indexing table. Something appropriate might be
    constructed from a drafting table and the thingy that clamps onto it
    that allows you to draw parallel lines etc.

    My MIL wrote her grocery lists in 2" letters, but if your vision isn't
    that bad you might not need to move the reading material around much at
    all, obviating the problem.

    Good luck!
     
    The Real Bev, Oct 15, 2008
    #12
  13. zulu

    zulu Guest


    I just tried writing 11 figure phone numbers down and re-reading them fast
    enough to dial without serious pausing.
    I needed 30 mm minimum height, so while not _quite_ as bad as 2 inches (51
    mm) .....!
    It is easier to keep phone numbers on the computer of course, one can scroll
    a cell of Excel (containing the number) to fill the width of the screen,
    which is a 26 inch LCD tv in my case <g>!

    Yes, the indexing table _is_ a problem, from a design point of view, but not
    the be all and end all.
     
    zulu, Oct 15, 2008
    #13
  14. zulu

    Dr Judy Guest

    A fresnel lens degrades contrast significantly. This would be a big
    problem for someone with low vision. Also, magnification would not be
    enough.

    Dr Judy
     
    Dr Judy, Oct 16, 2008
    #14
  15. zulu

    zulu Guest

    No comment on price justification...?



     
    zulu, Oct 19, 2008
    #15
  16. zulu

    The Real Bev Guest

    My guess would be "small market". Same as the problem with orphan
    drugs. Not that that justifies it, of course.
     
    The Real Bev, Oct 20, 2008
    #16
  17. zulu

    zulu Guest

     
    zulu, Oct 20, 2008
    #17
  18. zulu

    frank boyden Guest

    Hello,

    I am an account manager at independent living adis, these are the
    exact items we sell

     
    frank boyden, Oct 20, 2008
    #18
  19. zulu

    frank boyden Guest

    Hello, i would be happy to assist you. I am an Account Manager at
    www.independentliving.com , we have a broad range of portable
    magnifiers.

     
    frank boyden, Nov 5, 2008
    #19
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