I recently brought my new pair of glasses at Lenscrafter because of
their 30 days return policy. My prescription is about -7.0 on both
eyes with a bit of astigmatism in one. With these glasses I had hi-
index 1.67 lenses which are suppose to be from Essilor but the coating
is their own Scotchgard Protector.

Maybe I am being picky but it is really annoying seeing red outlines
along edges. I was wondering if this is due to chromatic aberration. I
tried complaining to Lenscrafter but I don't think that my optometrist
has my prescription right either because it is hard to focus on
traffic signs in intersections with 4 lanes. I stand on one side, and
it is difficult to read the time when left turns aren't allowed. I had
the optometrist reexam me, and he gave me a new prescription but it
didn't seem to help.

I don't know what was the index on my previous pair of glasses but the
thickness of the lens is about the same. Even when I stare at the same
point, as I tilt my head left and right, the vision changes.

With my prescription would the lenes be much thicker if I switch from
1.67 index to 1.6 index? Is the problem in the index of the lens, the
quality of the lens, or the coating on the lenses.

Side question: Nikon HCC ICE or Essilor Crizal Alize. I know these two
are just coatings but if you get the Nikon/Essilor coatings are you
likely to get the Nikon/Essilor lenses. Which is better?