Eye lenses

Discussion in 'Chemistry' started by timojin, Jun 30, 2017.

  1. timojin Valued Senior Member

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    What chemicals in contact lenses from cataract lenses
     
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  3. exchemist Valued Senior Member

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    My hovercraft is full of eels.
     
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  5. geordief Registered Senior Member

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    Your lucky .We didn't even have a hovercraft.
     
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  7. Michael 345 Valued Senior Member

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    My left foot does not have eels or salmon

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  8. geordief Registered Senior Member

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    I see he has retired.
     
  9. James R Just this guy, you know? Staff Member

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    Maybe he's asking whether there are chemicals in contact lenses that give people cataracts.

    Answer: I don't think so.
     
    Last edited: Jun 30, 2017
  10. exchemist Valued Senior Member

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    You from Yorkshire, then? I'd assumed Newcastle.

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  11. geordief Registered Senior Member

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    No connection ,just a username. The dog was from Newcastle,and so named.
     
    Last edited: Jun 30, 2017
  12. timojin Valued Senior Member

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    Well I thought this post could have some useful discussion,
    Most people in the 70 years old develop cataracts.
    I se a lot of bs.
    Some lenses are made from Acrylics, some modified silicone, some are soft, when cataracts lense is inserted what are the material is in the replaced lense .
    There are 41 million American using contact lenses
    The contact lenses is a business 7.2 billion.
    This is supposed to be a chemical forum
     
  13. gmilam Valued Senior Member

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    The problem was that your question did not make sense.
     
  14. Michael 345 Valued Senior Member

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    Read your original post

    It does not make sense

    Your post above also is nonsense

    Millions develop cataracts which are a natural occuring clouding of the lens of the eye and a quick Google shows

    What are Cataracts?

    A cataract is defined as the clouding of the eye’s natural lens, which is located behind the iris and the pupil. Cataracts are a natural eye condition and are the most common cause of vision loss in people aged over 40. In fact, cataracts are the leading cause of blindness worldwide. Thankfully, they can be easily treated with corrective lenses or cataract surgery

    https://www.visiondirect.com.au/opt...d-treatments?gclid=CPKt7K7-5dQCFQqBvQodRM0G6A


    Contact lenses are glasses

    Lot smaller

    Sit on the surface of the eye not perched on the nose

    Don't have a frame

    Having personally undergone removal of cataracts from each eye and having intraocular lens inserted as replacements I definitely noticed a difference

    Mostly brighter more vivid sharper colours and allover clarity of vision

    Still require glasses although some may not

    Aside from confusion about cataracts and contact lenses I find it odd that a Government would allow a 7.2 billion dollar business to operate which turns people blind???

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  15. timojin Valued Senior Member

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  16. timojin Valued Senior Member

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    Thank you for informing me . I had cataracts and my lenses were replaced. I am familiar with That.
    The point is what chemical materials are used in the replacement and what chemical material are used in contact lenses.
    That can not be more clear of a question.
    I would not expect from you since you are a retired nurse and I am a little familiar in the limitation of your profession in chemicals, my 2 wives were nurses.
     
  17. origin Trump is the best argument against a democracy. Valued Senior Member

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    Correct
    Then step carefully and get out of the cattle field.
    Look at this Wiki entry Introcular lens
    OK.
    OK.
    This is the chemistry section.

    Is there some sort of point to your post?
     
  18. origin Trump is the best argument against a democracy. Valued Senior Member

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    That is a clear question - your earlier attempts were not clear at all.
     
  19. origin Trump is the best argument against a democracy. Valued Senior Member

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    I already gave you a link to what cataract replacement lenses are made of and here is what contact lenses are made of: Contact Lense Material.
     
  20. timojin Valued Senior Member

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    Yes to discus chemistry of the material used in lenses and in material used in cataract surgery.
     
  21. Michael 345 Valued Senior Member

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    My first job was as a analytical chemist in London

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  22. timojin Valued Senior Member

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    Great ! so we have something in common > English language was not my priority nor is now. Material and science behind it is of more interest for me.
     

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