Nick Chan schreef:

Ask your fitter to look at your problem, maybe it is just the switch to
BL Purevision.

BTW, this is just one thought, there are many others but only a face to
face view on your problem gives the best answer.

Jan (normally Dutch spoken)

Have your eyedoc check for dry eye in the left.

Are there even extended wear lenses that aren't silocone hydrogel?

In any case, it's not exactly clear what you mean by "spoil".  You
mean it feels like there's something between the lens and the eye?
Can't see clearly through it?

I've tried PureVision lenses, and find them intolerably uncomfortable
- the edges are not smooth at all.  I've settled on Acuvue Oasys,
which I sometimes wear for a few days at a time.

But more often than not, I'll take the lenses out once a day, give
them a rub and rinse with multi-purpose solution, then pop them back
in.  I'll do this a few days in a row, then leave them out overnight
(or day, depending on when I'm sleeping at the time).

You don't mention if you use drops at all.  I find that after waking
up with lenses in, they are quite dry, and a couple drops are quite
necessary to avoid blinking incessantly for a couple minutes while
waiting for my tear ducts to wake up.

It may be something as simple as you sleeping on your left side, and
overnight inadvertently pushing bits of dust into your left eye, if
that's the definition of "spoil" you mean.

Hopefully that gives you a clue or two about how to test your own
theories before visiting your eye doc.