Straight talk
No coating eliminates glare
What you might expect to hear
“This coating eliminates glare and stops night-time halos.”
What is actually true
An anti-reflection coating reduces the light that bounces off the surfaces of a lens. It does not remove glare, it does nothing to a halo caused by the eye itself, and no lens sold anywhere does either of those things.
Why
There are two different complaints hiding under one word. Light scattering off a lens surface is a lens problem and a coating genuinely helps it. Light scattering inside the eye — from an early cataract, from a dry surface, from a large pupil at night — is not a lens problem at all, and the coating cannot reach it. Somebody sold the coating for the second complaint will be disappointed and will have paid for it.
What we do instead
We will put an anti-reflection coating on almost any lens and say what it does: a few per cent more light through, fewer reflections between your eyes and the person you are talking to, and less bounce from headlights. If the trouble is halos at night, the useful thing is an examination, not a coating.
The other eight
Straight answers to the rest of what this site will not pretend.
See what each coating actually does
Every coating on this site is priced and described on its own, with what it does and what it does not.