Development of visual acuity in infants and young children up to three years evaluated with the preferential looking method

Publisher Website
Google Scholar
Abstract
The normal patterns of development of the visual acuity in infants and young children up to the age of three were investigated using the preferential looking method. For those under 12 months old, the forced choice preferential looking method was used; for those above 13 months, a new modified method was used, developed by the authors. From the results it was estimated that the visual acuity of the normal infant at six months is 10 to 15 min; at 12 months, it is about 6 min. The acuity at 24 months is estimated to be 3 min of arc and reaches the value of 1.0 to 1.5 min, which is very near to the level of the adult, at 27 to 30 months. As to the success rate of the preferential looking method, the highest success rate under the age of 30 months was found in the age group from three to six months. The success rate was lowest in the age group from 13 to 18 months.