Astral vision, granted by wearing The Eyes of the Overworld, lets you see anything within radius 3, even if that space is dark or there are walls or boulders blocking your line of sight. This means you can see while blind (although it does not strictly prevent blinding - your blindness continues in the background until it wears off, or you remove the Eyes).

In NetHack 3.4.3, astral vision is subject to bug C343-93, a very minor bug which causes monsters seen with astral vision to be listed as seen with normal vision when using the farlook ([;]) command.


Your vision seems to dim for a moment but is normal now.
You were blinded while having astral vision
Your vision seems to brighten for a moment but is normal now.
Your blindness was cured while having astral vision
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