DhritarAshtra was physically blind and implicitly supported wrongdoing of his son Duryodhana. GAndhAri blindfolded her eyes to follow the distress of her husband & never objected Duryodhana.

Both of these are found in scriptures. I also scarcely remember similar dialog from BRC Mahabharata, where Bhishma/Vidura tells to/for DhritarAshtra not to extend blindness in emotional matters too.

Like how there is a folklore of "women can't keep secrets" - is associated with Yudhishtira's curse. Is the term "blind support" also associated with Mahabharata as a folklore or in reality?