Antes, J. R. (1974). The time course of picture viewing. Journal of Experimental Psychology, 103(1), 62-70.

The eye movements of 20 Ss were recorded as they viewed each of 10 pictures for 20 sec. The informativeness of regions within the pictures was determined independently by subjective ratings from 20 different Ss. Mean informativeness of locations fixated decreased over time and reached an asymptote after about 10 sec. of viewing time. Mean duration of fixation showed a steady increase and mean extent of saccadic eye movements showed a steady decrease as viewing time progressed. A pattern of visual exploration was described whereby Ss initially made many long saccades to fixate informative elements for short fixations; this behavior gradually evolved to fixating informative features less frequently and with longer examination of less informative details.