I got excuses like: "oh, these are better for computer work but worse for distance". Great... why are my old lenses more clear for both computer work and distance?
I went home with the new lenses and tried them for a night and a day. Unusable.
I went back and the optician's second attempt failed too. Now for computer work they were better and for distance they were still worse.
Attempt #3 was a match for my old lenses. Neither better nor worse. Mission accomplished? $500 well spent.
I'm sure in all 3 cases Zeiss made impeccable lenses. But it comes down to the optician's interpretation of the prescription I brought in (from a laser eye center's 8-machine exam I got the previous week) and their clinical examination of my eyes.
I expect that whatever Apple's Standard Operating Procedure will be for supplying the right lenses to people, it'll be mostly superior to your average optician.
I love that your anecdote has determined that most opticians will be worse at their job than an Apple Genius who might get two-three hours training on fitting the headset.
Getting the fitting right is built into their products from years earlier in the design process.
The Apple Genius is perhaps the last or second-last step in an SOP that results in their customers not angrily returning hundreds of thousands of headsets and swearing off the entire ecosystem.
Now sometimes Apple get things woefully wrong (e.g. butterfly keyboards, antenna gate) and refuse to admit defeat for years.
But on average, across years and dozens of product variations, they have a good hit/miss ratio.
Most strip mall opticians don't grind the glass themselves. Measurements are taken and sent to a specialist facility.
On the other hand, how much training does the Apple Genius fitting your headset receive?
Oh good, one more step towards Gargoyles (a subculture of people choosing to remain continuously connected to the Metaverse by wearing portable terminals, goggles and other equipment; they are nicknamed "gargoyles" due to their grotesque appearance - from Snow Crash).
Who said anything about strip mall opticians?
At least they let you swap the lenses. Will they do the unthinkable and let the iPad be multiuser as well?