Drunk driving continues to be one of the nation's most serious safety
problems. On the premise that oculomotor control provides a quantitati
ve measure that is very sensitive to alcohol impairment, an oculomotor
test previously developed as a portable hand-held Viewmaster viewer w
ith specially designed grating patterns as images was used to stress t
he oculomotor system. Test scores decreased with increased alcohol imp
airment along with a large dependence on individual lateral phoria sco
res. Unfortunately, there was a large amount of interindividual variab
ility, which may limit use of the test for the population at large unl
ess other individual characteristics are included.