Have found a box of disposable contacts, they must be about 8 years old, still sealed and look ok, no use by date etc, would they still be ok to use??

They’ve probably developed cataracts by now

There should be a use by date on them. There is on all mine.

If you are like me and only stick them in for a few hours while on a ride, then probably be OK. If you wanted to wear them all day for 16 hours, I might think twice.

will only be wearing them for an hour or two while riding.
eye sight hasnt changed since getting them.
need to sort out new pairs but found 10 pairs i forgot i had.

There should be a use by date on them. There is on all mine.

Perhaps the OP needs to wear them to see it? 😉

TBH there should be a date on the foil somewhere, perhaps stamped rather than printed.

Your post reminded me I only have 1 pair left. Just ordered 32 pairs for £12 from Daysoft.com. The last 32 pairs have lasted me just over half a year 🙂

thanks for that address, will have a look at daysoft now