Purchase this article with an account.
EE Birch, SL Fawcett, SE Morale, BG Jeffrey, AR O'Connor; Measurement of Stereoacuity Outcomes During Infancy: Infant Random Dot Stereocards . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2937.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Purpose:To develop a random dot stereoacuity test hat can be used to measure binocular sensory outcomes following treatment of ophthalmopediatric disorders. Methods:Infant Random Dot Stereocards were used in a 2AFC protocol to measure stereoacuity in 363 healthy term infants and children (894 tests) over the 1.5-month to 8-year age range. Success rate, mean stereoacuity and tolerance limits for normal performance were evaluated. In addition, stereoacuity was assessed in a cohort of 228 patients (age 4 months - 9 years) affected by common infantile eye disorders (317 tests). Test-retest reliability (inter-observer) and test validity (comparisons with standard clinical tests) were evaluated. Results:Overall, 91.3% of tests were successful. Stereoacuity in the normative cohort improved from non-detectable at 1.5 months to 635» at 4 months and 103» at 12 months. A further improvement to 72» was seen during months 18 to 24. The upper tolerance limit ranged from approximately 1000» at 6 months to 200» after 12 months and 50» by age 4 years. These data show excellent concordance with data from laboratory-based FPL and VEP infant stereoacuity tests. The mean (+SD) difference between test and retest scores was -0.03+0.35 log sec; 86.4.% of re-tests scores were within one card (0.3 log sec) of the original test score and the remainder of tests were within 2 cards. For the 76 children who were old enough to complete the Randot test (age = 54.9+18.5 months) and the 118 children who were able to complete the Randot Preschool Stereoacuity Test (age = 45.4+17.4 months), agreement between the Infant Random Dot Stereocards and the standard tests in assigning children to normal (40-60»), deficient (70-1000»), or nil stereoacuity groups was excellent (Randot: chi-square=48.5, p<0.001; Randot Preschool: chi-square=122.9, p<0.001). Agreement between the Infant Random Dot Stereocards and the 4 p.d. base-out prism test for bifoveal fixation was also good (chi-square=101.7; p<0.001). Conclusion:Infant Random Dot Stereocards provide quantitative binocular sensory data for the evaluation of treatment outcomes in pediatric ophthalmology.
This PDF is available to Subscribers Only