Glasses prescription question about PD

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MurrayM

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#258661 15-Oct-2019 12:43

I had my eyes tested at Specsavers a little while ago (thanks AA for the free test!) and asked for a printout of my prescription as I wanted to buy some glasses online. When I got home I noticed that the printout seems to have everything but the PD (Pupillary Distance, ie measurement between your eyes) box says "BIN" and doesn't have a number. Everything I've read says that this should be a measurement in millimetres. Is this some sort of code that Specsavers use to make it harder to order glasses online?

LennonNZ

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#2337385 15-Oct-2019 12:56

https://www.bostonglobe.com/magazine/2017/03/21/why-your-optometrist-doesn-want-you-know-your/k6FHsubxjTB2oYxeqBFD7L/story.html

https://marveloptics.com/how-to-guide/how-to-measure-your-pupillary-distance/

Delphinus

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#2337387 15-Oct-2019 12:58

I did the same thing, and the guy giving me the results seemed a bit confused. My printout also had a blank BIN. I had to specifically ask for it.

FWIW my PP results are:

Right: 34

Left: 32

(Or 66)

So I guess you should get something like that.

jonathan18

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#2337433 15-Oct-2019 14:25

Yeah, Specsavers won't provide this on their script - we asked only a couple of weeks ago in relation to my son's script, as we couldn't find frames that fitted him there so had to go elsewhere. I can't remember the excuse they used (my wife asked for the script), but it didn't matter to us this time as we were buying from another bricks and mortar shop, so just got them to do it when we ordered the glasses.

It's more frustrating if you want to order online. To get around that I just went to a local optometrist and paid them $10 to measure it for me; the retailer (Clearly) deducted the cost of that when I ordered the glasses so it didn't cost anything in the end, but for adults I assume it's a one-off thing anyway (unlike a kid who's still growing).

MurrayM

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#2337439 15-Oct-2019 14:36

My understanding is that for adults the PD shouldn't change, so once you've got it you're set.

I'll just measure it myself and see how that goes.

timmmay

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#2337445 15-Oct-2019 14:42

I think "Bin" is related to prism, which I don't think many people have / need.

Remember the PD for reading is less than the PD for distance viewing, as when you focus close your eyes point inwards somewhat. My eyes are sensitive to things like this, and a difference of 3-4mm in the PD makes a big difference to me. I'd just go get it measured professionally - my optometrist has a little machine to help him measure it.

PD can be specified as distance / close up as total distance between the eyes, or left / right (right / left) distance from the center. Mine is 61/57 which is the distance between both pupils.

steve2222

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#2337660 15-Oct-2019 18:57

Couple of other threads touching on this issue:

https://www.geekzone.co.nz/forums.asp?forumid=161&topicid=240834

https://www.geekzone.co.nz/forums.asp?forumid=161&topicid=223568