Yes, sorry, it is a UK/Irish expression. This forum is heavily biased towards our N American cousins, so I need to explain my 'terminology' in advance.

'Bog standard' - means absolutely standard, average, regular, etc. etc.

In reply to your previous reply & question re Factor of Safety. Yes, I considered the downsides. If the lenses began to irritate in anyway, I would have taken them out. However, Bausch & Lomb use the same lens material for their Monthly disposable lenses. I haven't detected any deterioration in my vision with a fresh daily lens over the day so I can be reasonably sure that the lens was not significantly changed over the day. The monthly Bausch & Lomb obviously are designed to last 28 days or so. It is not as if I was going to the moon for several weeks without a spare pair of lenses for each day.

I also test other things for Factor of Safety. If I do it in rock climbing then the test will be just off the ground so that if it does fail, then I don't fall far. Similarly, it is good practice to to check things that are mechanically joined with glue - wood, etc. or welding joints, etc. to see how good they are, etc. but obviously in a safe situation. Similarly, when I get into my car in the morning when it's cold and icy and I'm not sure how slippery the road is, then at slow speed and in a safe location I would deliberately brake to see how the car responds to the road conditions.

I have many many years experience wearing lenses so I do recognise when things are not right in my eye. I believe that the manufacturers will build in a good factor of safety so that the lenses are safe for most of the wearing population.

knotlob