to die with an unresolved regret or with a sense of injustice that has not been addressed, literally failing to close one's eyes

to die in peace having no regrets or unfinished business; to die content

To die without regrets or worries; literally "to close one's eyes in death," used to describe being able to rest in peace after seeing a wish fulfilled.

To close one's eyes and pass away; usually describes a peaceful death without regrets.