Breakdown of Szkła progresywne są drogie.
Questions & Answers about Szkła progresywne są drogie.
Here szkła means lenses in the optician’s sense. The basic noun szkło literally means glass, but in context it can also mean a lens or a glass lens.
So szkła progresywne refers to progressive lenses, not necessarily the whole pair of glasses.
In Polish, adjectives often come before the noun, but some adjectives—especially ones that classify a thing by type—very often come after the noun.
So szkła progresywne sounds like a standard product/category name: progressive lenses.
You may also hear progresywne szkła, but szkła progresywne is very natural when talking about a specific kind of lens in an optical/technical context.