Yes, John Colvan was the expert back in the 70’s and 80's. He made "anti glare spectacles that doubled as safety glasses had clips to prevent lens falling or being knocked out. He made them in conjunction with the RAAF and an optometrist in Melbourne by the name of Martin X Hogan at the top end of Collins St. I must have had about 4 or 5 pair of those specs over time and the latter ones were to a prescription. Had trifocals for a while, but at that time the top lens had to be a separate and that caused a few other problems, but it did make the overhead panel more readable - used to practice reaching for the switches etc without looking. That worked but the gauges up there you had to look at! Nobody seems to concentrate on good practical aviation glasses any more. Not the market obviously? Now easier to carry two pair - one anti-glare, one regular. Keeps you in line with the CASA requirement also.