The ruling on widening the eye opening in a woman's niqab

Question:
Regarding the niqab, O Shaykh, if the eye opening is widened, is that prohibited?

Answer:
There is nothing wrong with the niqab; the Prophet (peace and blessings be upon him) approved it.
Q: If they widen it?
A: The size of one eye or both eyes is fine.
Q: If some people widen it, is that prohibited?
A: It is prohibited. The size of one eye or both eyes is fine, without creating something that tempts people.
Q: Is what is called a "burqu'," where her eyes and part of her forehead are visible, considered valid?
A: The burqu' is the niqab.