Video of the Week: Trivex & Poly Comparison

[Robert Martellaro]

Does light scatter more in a thicker medium? Of course it would.

Is it "significant", i.e., can humans tell? I don't know.

Is it material dependent, or "purity" dependent? I don't know.

I don't believe scatter is much of a concern with spectacle lenses, more so with eye pathology, IOLs, etc., and certainly not as important as dispersion (see below).

Additionally, knowing the extent to which TCA degrades peripheral visual performance is important when designing spectacles.

https://www.osapublishing.org/josaa/...1764&id=326495

Best regards.

Robert Martellaro

[Barry Santini]

I really don't know the answer to this.
As a myope, the prism is at the bottom of the lens, so the chromatic aberration is at the bottom of the lens.

Same for hyperope. But here's what most miss:

"What is the TOTAL POWER at the bottom of a progressive between a myope and a hyperope?"

AH HA! Now you're starting to think....

Barry