This pseudocode reveals another truth: it can be surprisingly hard in many places to get lenses for rarer eye conditions. If you have e.g. mild astigmatism (actually extremely common!), you can expect to be persuaded to leave it uncorrected.
Never had anyone trying to convince me to leave it uncorrected.
When i wanted contact lenses, i asked about leaving it uncorrected, so i didn't need toric lenses, which come in fewer variations (i don't think there were daily disposable torics at the time, for example). They weren't having any of that.
Yeah, that takes a while, even with someone explaining it to you
theoretically they should rotate to match the axis if they're slightly out of position, but if it's way out of position it won't.
Not to mention manufacturers have different ways of indicating this (with different degrees of weirdness)
Indeed, ZenniOptical sunglasses simply don't come in m prescription. It flat out tells me to select their regular frames and pay for the tinting. Between my astigmatism and my prism in each eye I'm fairly limited.
Or it just gets expensive. Last Friday I was curious about the new Oculus but hate how VR headsets like my friend's Vive shove my glasses into my face or just simply don't fit and looked at inserts for it, the cheapest I could find from the companies that manufacturer the lenses were 98$ per eye.
I have it, recently got glasses and it annoys me that in my peripheral vision and while moving things get a little distorted. Glasses without astigmatism correction seem like a valid choice.