Just my 2 bits, from what I started trying last week. Our white Minka (8 months old) didn't have the worst case, (and worse from one eye than the other), but after seeing pictures and reading, I was then always noticing it and wishing gone.
I also started the AngelEyes about 10 days ago. Mentioned in luchetel post. ("AngelsGlow" might be similar?) Someone mentioned "2 months", but I see within just 1 week, with the same amount of manual eye cleaning, it appears to be way better; nearly gone already? Maybe I'll update later.
At their website,
www.angelseyesonline.com, you can see lots of photos with testimonials. Some others also said effect within a week. It's kind of spendy, but will try cutting back later; or try additional other supplement. I don't REALLY know how good this stuff is for a dog and wasn't anticipating having to give it for the next 15 years; oh well. We also switched to filtered water, since we always have a pitcher on our counter anyway -- one of those common Brita filters.
I sprinkle it on smallish amount of her kibble for her morning meal and add warm water to make a gravy -- wetting it so that she doesn't scatter the powder out on the floor -- and exclaim to her what good meal it is. She's been gobbing it up right from the start, although I'm guessing it's the warm gravy instead of dry kibble that pleases her.