I do wear glasses, but they have an anti fog coating. Also, I prefer to leave my nose out of the balaclava and instead cover it with a neoprene nose cover (NozKon), which helps prevent glasses from fogging (and doesn’t squish my nose).

I swear by the Seirus Masque for both skiing and cycling.[0] The neoprene fits tightly to your face, but lets your nose exhale freely, which minimizes glasses fogging. They’ve got a hundred variations now for different levels of comfort and warmth.

https://www.seirus.com/products/original-masque

It's a problem for me as a skier. Give Blackstrap products a try, I've found them to be much less problematic.