Eyestalk
![Pulmonate land snails usually have two sets of tentacles on their head: the upper pair have an eye at the end; the lower pair are for olfaction.[1]](/Images/godic/202501/31/Snail-front-0A1456.jpg")
![A stalk-eyed fly.](/Images/godic/202501/31/Diopsid21456.jpg")
![Well-developed eye of Eustrombus gigas on eyestalk. There is also a small tentacle on the eyestalk.](/Images/godic/202501/31/Eustrombus_gigas_eye1456.jpg")
- This article is about eyes mounted on stalks. For the instinctive tendency to track prey, see eye-stalking.
In anatomy, an eyestalk (sometimes spelled as eye stalk or known as an ommatophore) is a protrusion that extends the eye away from the body, giving the eye a better field of vision. It is a common feature in nature and frequently appears in fiction.