The Eyes of the Overworld
( The Eyes of the Overworld 
| |
|---|---|
| Base item | pair of lenses |
| Affiliation | |
| When carried | |
| When worn |
|
| When invoked | |
| Base price | 2500 zm |
| Weight | 3 |
The Eyes of the Overworld is the monk quest artifact. It is neutral for wishing purposes.
Its base item type is a pair of lenses, so wearing it lets you read spellbooks in two-thirds the time duration (and with a small bonus to success rate), and you can also search more successfully.
While wearing the Eyes you are granted astral vision: the squares around you are illuminated as would be lit by a lamp. The difference is astral vision penetrates walls, doors, solid rock, and any other obstruction. Objects seen through astral vision using the farlook command are described as though you had personally handled the item (a behavior similar to a blessed potion of object detection; for example, viewing a scroll on the floor will tell you its label, not merely "a scroll," and gems discovered embedded in rock will appear with whatever type-name you might have given them. This is highly useful in trying to find secret doors or trying to navigate Gehennom without magic mapping.
While carried, the Eyes provide magic resistance.
Invoking the Eyes provides enlightenment. You can use this as a semi-reliable method to identify rings and amulets (the only problem is when you try to identify a ring that provides an intrinsic you already have, such as stealth).
Gaze attacks
While wearing the Eyes, blindness from quaffed or thrown potions, rotten food, yellow lights, cream pies, certain vortices, bolts of lightning, cursed towels, etc., will not obstruct your vision; internally, the game tracks the duration and cause of your blindness, but all effects of those status ailments are overridden by astral vision (similar to [[[Grayswandir]]'s behavior with hallucination). Because Nethack assumes vision is symmetrical - that is, if you can see a monster, it can see you - monsters are capable of using gaze attacks through walls and other obstructions as long as you are presently viewing them through astral vision (that is, if they are within a three-tile radius while you are wearing the Eyes). This can be lethally tragic when dealing with Medusa, or if a pesky umber hulk on the other side of an unphaseable/undiggable wall repeatedly confuses you. In such cases, it may be necessary to temporarily remove the Eyes, as astral vision becomes a liability instead of a boon.
The Rogue level
Astral vision does not function whatsoever on the Rogue level.
Encyclopedia entry
... and finally there is "the Eyes of the Overworld". This
obscure artifact pushes the wearer's view sense into the
"overworld" -- another name for a segment of the Astral Plane.
Usually, there is nothing to be seen. However, the wearer
is also able to look back and see the area around herself,
much like looking on a map. Why anyone would want to ...
