When the grays or black are showing red, change them. For other colors, change them when the colors are no longer vibrant or if the lenses are taking a long time to tint.
More important is how many lenses you are tinting. On sun tints I would not go more than 20 lenses and maybe even less. Consider what you charge for tinting versus what you paid for that bottle of...
Right before the pandemic- age 25 with congenital aphakia, which is about all we'll see nowadays. Same scenario as the above- he said they were the first pair of eyeglasses that were...
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You make an interesting recommendation regarding...
You make an interesting recommendation regarding temples, and I want to see if I can figure out why.
drk 05-17-2022, 05:42 PMI know that high plus lenses cause the dreaded "jack-in-the-box" phenomenon, meaning that there...