glaze over

verb3

1. •
   To form a glazed coating: to ice over or otherwise to become covered in a glossy sheen.
2. •
   To become unfocused, as if through boredom.

   • Someone's eyes may glaze over before or during a seizure.
3. •
   (nonstandard) To gloss over.

   • An important issue that is often glazed over.