Originally Posted by
mustafagander
I use bifocals and in the few aircraft where I need sunglasses I use clip ons. Yeah, I know daggy to the max but very effective - just flip up the lens and voila, no impediment to IFR.
I've used multi focal transition glasses for over 20 years and never had a problem in any situation. The newer ones in particular change shade very quickly but irrespective they have never been dark enough to cause me any issue even in the brightest sunlight and then descent through cloud.