absence of sight, esp. when due to a structural defect in or absence of an eye
Word origin
[an-1 + -opia]an- is a prefix occurring before stems beginning with a vowel or h in loanwords from Greek, where it means “not,” “without,” “lacking” (anarchy; anecdote); used in the formation of compound words. Other words that use the affix an- include: anacrogynous, anapsid, anarchy, anopheles, anoxia