8 -fg foreground color choose a different color for the pupil of the eyes.
8 -bg background color choose a different color for the background.
8 -outline outline color choose a different color for the outline of the eyes.
8 -center center color choose a different color for the center of the eyes.
8 -backing { WhenMapped Always NotUseful } selects an appropriate level of backing store.
8 -geometry geometry define the initial window geometry; see X(__miscmansuffix__).
8 -display display specify the display to use; see X(__miscmansuffix__).
8 -bd border color choose a different color for the window border.
8 -bw border width choose a different width for the window border.
8 -shape uses the SHAPE extension to shape the window. This is the default.
8 \+shape disables use of the SHAPE extension to shape the window.
8 -render uses Xrender to draw anti-aliased eyes. This is the default if xeyes has been compiled with Xrender support.
8 \+render disables Xrender and draws traditional eyes.
8 -distance uses an alternative mapping, as if the eyes were set back from the screen, thus following the mouse more precisely.
8 -biblicallyAccurate renders the eyes as if they belonged to a biblically accurate angel.
8 -help print a usage message and exit.
8 -version print the version number and exit.
Copied from the NeWS version written (apparently) by Jeremy Huxtable as seen at SIGGRAPH '88