  In this survey I discuss ophthalmic neurophysiology and the experimental
considerations that must be made to reduce possible noise in an eye-tracking
data stream. I also review the history, experiments, technological benefits and
limitations of eye-tracking within the information retrieval field. The
concepts of aware and adaptive user interfaces are also explored that humbly
make an attempt to synthesize work from the fields of industrial engineering
and psychophysiology with information retrieval.
