"Draagt jouw zoon een bril?"
Translation:Does your son wear glasses?
"A glass" is an object made of glass for holding a liquid and drinking from. You can't wear it. Example: I'm drinking a glass of water.
I can't get my head around the fact that a pair of glasses is regarded as a singular object in Dutch and German (Brille). Considering that there are two lenses, and that such gadgets are regarded as plural in English, French (lunettes), and Spanish (gafas), this seems really weird. I've been to the Netherlands, and I can attest that Dutch people mostly have two eyes :)