Greeting Oomcurt,
Knoblock is the brand name of a specialized shooting eye wear for competitive shooters. They are totally impractical for the hunting field.
My eyes tend to be a bit light sensative, and I have always wore some type of sun shade.
There is nothing currently politically correct about wearing shooting glasses for safety. Fifty three years ago at age 14, my rifle team coach had all of us wearing shooting glasses.
For years, until about age 45, I did not need prescription glasses, so was able to wear plain Bausch and Lomb Ray-Bans both for shooting and sun shades.
Based on research by the Russians, a light green is the best color for shooting a black target on a light background under bright light, indoors or outdoors. So far no scientific research has found them to be wrong.
It just so happens this color is great as a sun shade too. it allows maximum visibility, softens the bright light light, and minimizes eye strain.
The amber tint is best for cloudy or overcast days, but is too much for bright light.
Safety concerns are not part of any political correctness, and for me never have been. perhaps this is because of spending 37 years teaching technical and vocational programs, with periodiac stints working in industry.
I have been an NRA member since 1956 and have all of my American Rifleman since then, in bound volumes. As far back as then, Bausch and Lomb advertised on the first full page inside the front cover. Many times the full page ad promoted their famous Ray-Ban glasses with safety first as the issue.
If eye safety has entered the arena of political correctness, it is because of lawyers, aided and abetted by stupid people who subscribe to the current philosophy, that nothing is their fault. Whatever misfortune befalls them is caused by somebody elses neglect, and therefore a lawsuit is in order.
Anyway, hope this explains the "Knoblock question" to you.
Best regards, John L. Hinnant