"👁️👄👁️" is an emoticon commonly used to represent a surprised or bewildered expression. It consists of two eyes (represented by the "👁️" emojis) and a mouth (represented by the "👄" emoji) in between them. On the other hand, "O o" is a textual representation of a similar surprised or shocked expression, with the capital letter "O" representing the eyes and the lowercase letter "o" representing the mouth.