[Jewelry making - Article 00326] - Re: [Orchid] Jewelry making and vision problems

[Brian]

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>     ...I thought cataract surgery consisted of removing scar tissue
>     from the surface of the lens, making it all shiny and new again. 

    That's the cornea: the front surface of the eye. The focussing job
    of the eye is done by the cornea as well as the lens. LASIK-type
    surgery is where the shape of the cornea is altered to allow better
    vision. A recent improvement in cornea surgery is to lift up a
    section of cornea surface, do the laser-shaping to the cornea, then
    replace the flap. It's still a risky operation. 

>     I had no idea they would remove my lenses and give me artificial
>     ones!! What are the replacements made of? Do they every go bad,
>     degrade, cloud up, fall out??? 

    On the other hand, the safety and effectiveness of cataract surgery
    are generally well established. They remove the old lens and put the
    new lens in through a tiny 3mm stitch-less incision at the edge of
    the cornea (not right in front) and the new lens is 'shrink-wrapped'
    in place inside the same neat capsule where the old lens was. The
    liquid gel inside the eye is untouched, as it's behind the lens
    capsule. 

    Simple diagrams of the operation:

        If you're a lifelong myope like me you've really appreciated
        being able to read without glasses. I recomend you stay a myope
        (up to -1 diopter) when it's your turn for cataract surgery. The
        alternative is perfect distance vision but a constant need for
        reading glasses, due to the new lens lacking accommodation. 

Brian

B r i a n   A d a m   
e y e g l a s s e s   j e w e l l e r y
Auckland NEW ZEALAND
www.adam.co.nz
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