Under-eye Hollowness or Sunken Eyes Home A-Z Health Information Health Library A-Z Under-eye Hollowness or Sunken Eyes Overview Under-eye hollowness, also known as tear trough deformity or sunken eyes, is the sunken appearance under the eyes, often accompanied by dark circles. This often occurs due to a loss of fat in the tear trough area. Types Mild: It is marked by slight indentation.Severe: It is marked by deep hollows with prominent dark circles. Symptoms Sunken appearance under the eyes, dark circles, and a tired look. Causes Aging, genetics, dehydration, lack of sleep, and weight loss. Diagnosis Physical examination and patient history. Treatment Fillers (hyaluronic acid)Platelet-rich plasma (PRP) therapyMorpheus8, depending on the underlying cause