Success rates in testing monocular acuity and stereopsis in infants and young children.
This study demonstrated how success in stereopsis and monocular acuity testing in the under-fives changes with age. Monocular testing was least successful with 1-2-year olds, while success with stereopsis testing increased linearly to 100% by 3 years. The differing patterns mean that a reasonable degree of success with one test or the other is likely whatever a child's age. Since the demonstration of either stereopsis or normal monocular acuities rules out the presence of any gross visual anomaly, the age-appropriate use of the two types of testing will facilitate the early detection of any abnormality.
Shute
R
R
Department of Optometry, University of Wales College, Cardiff, UK.
Candy
R
R
Westall
C
C
Woodhouse
J M
JM
D000367:Age Factors; D002675:Child, Preschool; D003867:Depth Perception / Q000502:physiology*; D006801:Humans; D007223:Infant; D011379:Prognosis; D014787:Vision Tests / Q000379:methods; D015349:Vision, Monocular / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology*