On Fri, 15 Feb 2013 20:58:26 +0000, David Hill wrote:

You say about about the replacement lens being matched to the eye, I'm
not sure what you mean by this,

Eyes are different sizes thus have differnt focal lengths. Mine a wrong
full stop as I'm shortsighted. But if they swapped the lenses in my eyes
they could fit ones matched to the focal length of my eyes and I may not
need to war glasses all the time.

... if you are referring to eye colour then there is no matching to do
as the lens is clear, all the colour of the eye is in the Iris.

well deeeerrr...

You might find this of interest
http://www.nhs.uk/conditions/Catarac...roduction.aspx

Good grief dumbed down to the level of a 6 year old.

But only says what I said, it was the third world cateract operation I
decribed not a whizzo first world one. But the basics are the same and I
was right about rigid fixed focus (monofocal) or flexable (accomodating)
lenses.

I can't get me head around how the multifocal lenses work. I wear
varifocal and look through the bottom of them for close work, but I'm
still looking through the center of my eyes lens. How can you look
through a different part of your own eyes lens? Or do you still look
ahead but make your brain concentrate on the lower in focus part of the
whole image you see?

--
Cheers
Dave.