The eyes are the mirror of the soul” is a metaphor that suggests a person’s emotions, thoughts, and true nature can be reflected in their eyes. It means that a person’s eyes can reveal a lot about their inner feelings, such as love, hate, and sadness. 

The origin of the phrase is uncertain, but some say that Cicero (106-43 B.C.) was the first to use it, saying, “The face is a picture of the mind as the eyes are its interpreter

Psychologists and researchers have studied how the eyes communicate emotions and feelings. For example, dilation is a process in the eye that can indicate what’s happening inside a person’s mind and heart. It can also be used to assess arousal in psychological disorders. 
The process of the eye which really represents the story of your mind and the heart. It signals everything that’s happening inside and sometimes gives away apt information such that the arousal it causes is used to assess in psychological disorders. Similarly criminal investigation procedures and lie testers which are used by investigation agencies capitalize much on the dilation process to access the truth and gravity of the matter.

Our experts at Vista Eye support the evidence and have found positive elements in the belief that dilation does mirror emotions. Much research and development is still in process for taking the procedure a step ahead and develop its ground to address different issues faced by mentally disturbed people.