title: Preferential looking acuity in infants from two to fifty-eight weeks of age.
abstract: The fast preferential looking procedure was used to obtain measures of acuity in a group of infants without visual problems whose ages spanned the 1st year of life. The results show an increase in acuity on horizontal and vertical square wave gratings from about 6/360 Snellen at 4 weeks of age to about 6/18 at 1 year. Acuity on obliquely oriented gratings (045) increases more slowly so that by 1 year of age it is only 6/36.
mesh_terms: D000367:Age Factors; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D014787:Vision Tests / Q000295:instrumentation / Q000379:methods*; D014792:Visual Acuity