The Orbicularis Oculi is a circular muscle surrounding the eye. It plays a crucial role in closing the eyelids, allowing for blinking and protecting the eyes from debris and bright light. This muscle is essential for maintaining eye moisture and overall eye health. Additionally, the Orbicularis Oculi is involved in facial expressions, such as squinting or winking. It is innervated by the facial nerve, which controls its movements. Understanding this muscle is important in fields like anatomy and ophthalmology, as it contributes to both functional and aesthetic aspects of the face.