The development of visual resolution in infants and toddlers tested monocularly with optokinetic nystagmus

Optokinetic nystagmus (OKN) has been used to measure the visual resolution of a variety of species, but little is known about the development of OKN resolution in normal children. We used OKN to estimate the monocular visual resolution of 181 children, each tested at one of seven ages between 2 and 36 months. The child watched black-and-white vertical stripes moving horizontally across an 84 x 84 deg screen at 13 deg/s. The estimate of visual …