“…This plays a key role in the sloth's slowness (Britton, 1941; Piggins & Muntz, 1985; Wislocki, 1928). Hitherto, the study of the eyesight of the sloth was performed by a few authors (Adam, 1999; Andrade‐da‐Costa et al, 1987, 1989; Beebe, 1926; Britton, 1941; Collin, 2008; Hayssen, 2009, 2011; Krieg, 1961; Menegaux, 1908; Meritt Jr., 1985; Piggins & Muntz, 1985; Prince, 1956; Rochon‐Duvigneaud, 1943; Sena et al, 2021; Smith, 1898; Tirler, 1966; Walls, 1942; Wislocki, 1928). Additionally, the geometry and tonometry of the eyeball were described in the sloth (Braz et al, 2020).…”