Japanese 小ナカ (konaka), 小ナカデ (konakade)
Small eyes are one-space eyes, two-space eyes and three-space eyes.
Unlike a big eye, a small eye provides as many liberties as the number of empty points in the eye.
In addition, small eyes are at a disadvantage vs. big eyes in a capturing race. See Big Eye - Small Eye and Eye versus eye capturing race.
See also the pages in the Eyes Collection.