Of course it does. But your thread got hijacked by our resident troll, a
so-called engineer who will insist on injecting pea-brained potshots and
making the thread about him, rather than you.

Of course the mtf relates to "perceived sharpness". One problem is we don't
have a reliable scale - no good way to assign values to "perceived
sharpness" or its inverse, "blur," other than indirect measurements of
resolution like snellen acuity or logMAR.

You can bet that blur increases as mtf decreases. But mtf is determined
using a focused optical system. Most of the problems with human blur involve
systems that won't focus properly. Blur can vary from moment-to-moment,
present at some distances and not at others. But the MTF is intrinsic and
constant, and the blur it contributes is from constant factors, like media
transparency and optical aberrations.

-MT