A display format adjustment system includes a receiving module, a visual condition determination module, a display format determination module, and a display control module. The receiving module receives content for display in a first display format. The visual condition determination module determines a visual condition of a viewer in front of a display. The display format determination module determines a second display format based on the first display format and the visual condition of the viewer. The display control module displays the content in the second display format on the display.