I assume marking the pupillary distance would result in a vertical line on each lens of the pupil center. But what she was marking was a horizontal line.
Around my hometown the shops that had their own labs for at least the straightforward prescriptions have long since been mostly trampled underfoot by the Luxxotica cartel. At least by law they have to hand me my prescription and I can go to Costco or send it to Zenni.
A common pitfall there is that in many chains/practices the optometrist’s actual prescription writeup will not include the interpupillary distance measurement, which is measured instead afterwards when you are getting fitted for the glasses and the optician enters it in a work order. So it may not be printed in the prescription sheet that is handed to you to use elsewhere.
Yes and some places have chips with their burgers instead of fries. Shop around to get the best prices and selection.
Progressive lenses are more than just the Rx and PD. They take into account the optical centre, the reading corridor, the angle of the frame against the face, etc. My optometrist takes a half dozen separate measurements as well as using an optical scanner that captures you looking at a fake book. The lenses are then custom made for your viewing profile.
Yeah. I shouldn’t have presented it as an either/or. My mistake.
The optical center (OC) is also used as the basis for determining where to place the progressive segment of the lens.
Bored? 17min YouTube vid explaining how this works.
Not that bored. And also I’ve never seen the pupillary distance marked on new glasses. I assume, again, that for properly fitting ones, the center of the lens should be about where the pupil is.
Best practice is to mark the optical center of every pair of eyeglasses every time.
Having a disparity between the true optical centers and the pupils can cause uncomfortable and distressing symptoms for the eyeglass wearer – the stronger or more complex the prescription, the greater the potential for those symptoms:
This is because the pupillary distance isn’t part of the prescription, any more than your temple width is. Sometimes the optician will write it on the Rx anyway, but often you just have to ask them to do it. I’ve never had one say no.
No, My optometrist charged me a gigantic sum of money for glasses that I could buy on Zenni for $30.
Also Zenni both made them and shipped them faster than the optometrist made them. Also I had to go back to the optometrist office to pick up my glasses from them.
I’ve bought glasses from Zenni Optical and yes, they’re very inexpensive, but I also think they’re also constructed more cheaply than the ones from a regular shop.
Oops - too late to edit - I meant sometimes the optometrist will write it for you on the prescription.
Idk if your video mentioned it, but the pupillary distance should actually be a couple measurements - not only the distance between the pupils, but the distance from the center of the nose bridge to each pupil. Eyes aren’t always symmetrically placed and one pupil may be a millimeter or two further from the center of the bridge than the other pupil, which obviously affects where the lens optical center should be. I had glasses once that didn’t allow for that, and I was unhappy for a year. I’d just chalked it up to it being my first pair of progressives.
Lenscrafters usually had my glasses ready within 12 to 24 hours.
For example, I go by at 2pm and select a frame. They’re ready to pickup the next morning.
I always paid extra for scratch resistant lenses. I’m pretty sure Lenscrafters made them on site.