Is the swimming glasses which has brown glasses used for day or night time?

Question

Is the swimming glasses which has brown glasses used for day or night time?

Answer 1

Either.  They are called goggles.  The day is nice because it cuts the glare.  At night in the 1970's we didn't wear smoke colored goggles unless strictly a backstroker because there were no lights and people couldn't afford to buy 2 pair because they were so expensive at $1.75.  But now pools have interior lights and the decks are lit as well.

Answer 2

What?