In this webcast, Dr. Luisa Mayer of the New England Eye Institute at Perkins talks about the development of tests of visual acuity in babies through the means of Preferential Looking. Preferential Looking is something that a baby does when they see something interesting, next to something that is not interesting.
The field of vision science and the study of the development of visual perception began in the 1950s. Dr. Mayer takes the viewer through the advances in the study of how babies see, from FPL (Forced Choice Preferential Looking) using stripes of different widths for very young babies, to OPL (Operant Preferential Looking) to hold the interest of older babies and children.