The lacrimal groove refers to a concave groove that appears on the nasal side of the lower eyelid starting from the inner corner of the eye. It is caused by the atrophy and drooping of the soft tissue at the lower edge of the orbital diaphragm. Some people can even extend to the cheeks. Due to the difference between the indentation of the lacrimal groove and the surrounding skin, obvious indentations are formed on the face, which affects the appearance.