Explainer talk:Why early improvements are so fast

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Ciliary spasm and eye strain

When you use full strength glasses for close-up ... In addition to this ... manifesting as pseudomyopia. " I thought the official position was that psuedomyopia was before you ever got glasses. Can probably be resolved by reordering the text. Divenal (talk) 15:38, 11 June 2020 (UTC)

@Divenal: I feel as if I've clarified this with a change I've made. Feel free to open up discussion if needed. -NottNott (talk) 11:43, 13 June 2020 (UTC)
@NottNott: Thanks. I know you think I should do it myself, but (a) I don't think I believe in lens-induced myopia (as a distinct stimulus), which is probably heresy, so it's a bit hard to write convincingly about it. (b) I haven't really quite figured out how ciliary spasm and pseudomyopia work. And (c) don't forget that I'm still new here... I don't know enough about the teachings yet. That said, I have a vague feeling that perhaps the pseudomyopia bit belongs naturally in the overprescription section - after all, if you have pseudomyopia, and you get any kind of prescription at all, then by definition you are overprescribed :-) I may yet have a go at editing it.Divenal (talk)
(a) Heresy detected
(b) That definitely wouldn't help
(c) You'll get it eventually, I'm sure Face-smile.svg
I like to separate overprescription and spasm. What's often the case is optometrists prescribe over what you need, even if your eyes are packing loads of ciliary spasm and pseudomyopia. Overprescription is lightning fast to get rid of, pseudomyopia relatively quick, axial elongation takes ages. -NottNott (talk) 15:32, 13 June 2020 (UTC)
@NottNott: Ah, I think I was wrong in the first place... I don't think psuedomyopia strictly means you're not really myopic at all. I think it means you have a temporary increase in myopia, which might be from 0 to some, for an emmotrope, but could still apply even if you already have axial elongation. Divenal (talk)
@Divenal: Pseudomyopia 100% can mean you're myopic, you've got it Face-smile.svg -NottNott (talk) 15:58, 13 June 2020 (UTC)

@NottNott: (this is completely the wrong place for this, and there's no reason why you should be singled out to answer it. Which had been why I had been wondering about being able to flag things more generally. But not to everyone. Only to people who had been here a while and knew stuff. Anyway... getting to the point...)

"Overprescription is lightning fast to get rid of". Hmm... is it ? For those of who live in countries where prescribing lenses requires a license (eg here in the UK), it means going back to your optician and trying to persuade them to give you a weaker set of glasses. How do you actually know if you've been overprescribed ? "it just comes off" may be easier said than done. (And if you've just paid lots of money for your new glasses, you might not be so happy about it! Unless you can blame the optimisation and have them pay to replace the lenses.) The quick fix is ensuring you don't wear them when using phone/tablet, unless you have to. Is getting differentials more important that getting a new prescription ? In a sense, fixing the overprescription is just getting normalised. But I think Jake recommends doing that 6 weeks after getting differentials ? Anyway, if you've just been given a new prescription, your previous pair of glasses might be a good substitute for normalised. That's basically what I've done. They're probably slightly weaker than recommended - I'd already skipped an upgrade or two, so they had reached below legal driving minimum by the time I replaced them. But I'm waffling again...Divenal (talk)

Wouldn't pseudomyopia be the main reason for overprescription, rather than just tweaking out the last bit of blur. (Do they use the red/green test for fine-tuning ?)Divenal (talk)