A surgical retractor includes a first component and a second component. The first component includes a ring structure and a conical outer wall. The ring structure has a first opening and defines a first plane. The outer wall forms an ellipse-shaped second opening in communication with the first opening and extends below the ring structure at an acute angle with respect to the first plane. The second component includes a top structure and a conical inner wall. The top structure has a third opening and defines a second plane. The inner wall forms an ellipse-shaped fourth opening in communication with the third opening and extends below the top structure at an acute angle with respect to the second plane. The top structure is disposed at least partially inside the ring structure such that the second component is rotatably adjustable with respect to the first component.