Michael C Brodsky
BACKGROUND: Primitive adaptations in lateral-eyed animals have programmed the oblique muscles to counterrotate the eyes during pitch and roll. In humans, these torsional movements are rudimentary. PURPOSE: To determine whether the human oblique muscles are vestigial. METHODS: Review of primitive oblique muscle adaptations and exaptations in human binocular vision. RESULTS: Primitive adaptations in human oblique muscle function produce rudimentary torsional eye movements that can be measured as cycloversion and cyclovergence under experimental conditions...
June 2002: Archives of Ophthalmology