by george » Sun Feb 22, 2015 9:28 pm
Jerry,
I like the progressive lenses I got from Costco better than the progressive lenses from Zenni. As I said above, they may have improved their glasses at Zenni, as they now list them clearly as digital free form, but when I bought mine, they would not confirm that they were free form lenses. Just because lenses are digital and free form doesn't mean they will be better, but it is a better technology that allows them to make more precise and complex surfaces on the lenses.
In my case, I find that the Costco progressive lenses have fewer blurry areas during day to day activities. They are very good for near and intermediate distances, but I do have some blurriness for far distant vision, but I don't think it is any worse than my Zenni progressives were. My Zenni progressives were fine for near and intermediate, but I found I'd have to frequently adjust my head to make sure I was angled just right towards what I'm looking at. The near vision, when lined up, was far superior to my previous single vision lenses, so I adjusted to them without too much trouble. However, I found the Costco lenses seem to have a wider field of clear vision. There is still some blurriness if I look towards the sides, but it is rare that I need to reposition my head to deal with it.
So, the Zenni glasses are adequate and a great price. The Costco glasses I find very good at a good price relative to the other premium progressive lenses.