What constitutes good quality glasses? Or rather: good quality lenses? The frames are mostly a matter of taste, but for the optical component, is a €150 piece of glass significantly better than a €100 piece of glass? Who has the lead in material science here? Japan, Germany? Any good sources on that topic?
More expensive lenses get you: * A material with a higher refractive index (-> thinner glasses) and higher Abbe number (-> less dispersion). Scroll down to the "Optical Glass Selection" in this article for a diagram: https://www.edmundoptics.com/knowledge-center/application-no... - the stronger the prescription, the more it matters, but generally the step up from the cheapest material is much more significant than fr…
Some more anecdata: The lenses' coating from my cheap unbranded glasses (plastic lenses) have begun to disintegrate/separate from the glass. My other glasses' Zeiss lenses are fine still (both being 8 and 6 years old).
Other than that, to the OP: get what you like, if you need the super thin lenses (depends on your level of myopia), go with the expensive stuff, else the cheaper lenses will also work. The more expensive coatings will filter more reflections, do you need a polarizing screen (doesn't work well with LCDs though)?. Then there's the lens material: glass (more scratch resistant) vs plastic (safer, because shatterproof). If you need two zoned lenses thats also different, and way more expensive.
Edit: oh and make sure that the eye distance is properly measured (i.e. at all), that is to make sure that the optical center is ligning up with your eye