I've looked through a lot of scopes that are very clear both expensive and cheaper ones, but i don't buy a scope based on that alone!
Take your scope, put it in the freezer over night, and then the next day drop it directly from the freezer into luke warm water!! "If" you see any bubbles, i wouldn't want it on any of my big game rifles no matter what it cost!!!
All of my "so called expensive" scopes easily pass this test! When i hunted for weeks at a time in weather from freezeing to warm all on one hunt, i just did not need a scope that would fail, because i tried to save $$ on my scope!
BTW, although i do own several brands of scopes, i don't own even one Simmons, or Tasco scope, i have more Leupolds than anything else.
Drilling Man