Quote:
Originally Posted by HVAC
I read this article from a British newspaper claiming that contact lenses that are sold as "monthly" are exactly the same as the ones called "dailies."
They claim that all these lenses are exactly the same, even going so far as to claim that "all these lenses are made of the same material in exactly the same proportions - 42 per cent polymer and 58 per cent water."
The article goes on the say that "The only difference is that the daily versions have fractionally different diameters and curves."
That sounds like a lot of what the late British author Douglas Adams might call "a load of dingo's kidneys" to me.
Has anyone heard of any British newspapers being sued lately by contact lens manufacturers?
Could this actually be true? |
It took me about two minutes to refute this. Just choosing a daily disposable lens at random, I found out that 1-Day Acuvue
contacts are 58% H2O and 42% Polymer (etafilcon A in this case.) So far the Brits are correct with the proportions.
Now let's look at a monthly disposable contact lens, Purevision. The recipe for one of these lenses is 36% H2O and 64% Polymer (balafilcon A).
Well, so much for "all contact lenses being the same." You could go to Lens.com and see these proportions for yourself.