Eyestalk

This article is about eyes mounted on stalks. For the instinctive tendency to visually track prey, see Eye-stalking.
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]

In anatomy, an eyestalk (sometimes spelled eye stalk and also known as an ommatophore) is a protrusion that extends an eye away from the body, giving the eye a better field of view.[1] It is a common feature in nature and frequently appears in fiction.[2]

  1. ^ a b "Slug and Snail Anatomy". All About Slugs. Retrieved 7 December 2015.
  2. ^ Allayie SA, Ravichandran S, Bhat BA. Hormonal regulatory role of eyestalk factors on growth of heart in mud crab, Scylla serrata. Saudi J Biol Sci. 2011;18(3):283-286. doi:10.1016/j.sjbs.2011.02.003