Figure 4.

Differentiating lower eyelid fat bags (top) from fluid bags (middle). Note the compartmentalisation of the fat bags (top left), increase in up-gaze (top centre), and decrease in down-gaze (top right). Fat bags are bound inferiorly by orbital rim hollow. In comparison, a fluid bag is not compartmentalised, and does not change much with gaze (middle left, centre and right images). Its borders are indistinct, and may not always be restricted by orbital rim hollow (bottom). The bottom panel of images show a lady with both fat and fluid bags. Note that the fat reduces in down-gaze, but the fluid bag does not