Normal Values of Contrast Sensitivity in Children Between Four and Seven Years in the Locality of Chapinero in Bogotá

Abstract

The contrast sensitivity tests (cs) are a powerful toll for determining the vision capability. It isimportant to know the development of this function and have precise parameters for the earlydiagnosis of abnormalities. <em><strong>Objective:</strong></em> To determine normal values for sc with the FunctionalAcuity Contrast Test (fact) in children between four and seven years in the locality of Chapineroin Bogota. <em><strong>Materials and methods:</strong></em> An observational cross sectional study was performed with 280eyes. They were classified into two groups: Group 1, four to five years of age, and group 2, sixto seven years of age, valuing contrast with fact for the different spatial frequencies. <em><strong>Results:</strong></em> csvalues were determined with the average, interquartile range and the statistical test U from MannWhitney, which revealed no significant differences for any of the spatial frequencies. The normalrange found for frequency A were between six and seven; for frequency B, between five and seven;for frequency C, between five and seven; for the frequency D, between four and seven; and forthe frequency D, between five and seven. Comparing the ranges for both groups, there were nostatistically significant differences in most frequencies. <em><strong>Conclusions:</strong></em> The range and average foreach of the frequencies were within expected ranges for the test; it was observed that there weredifferences in the development of cs between groups A and B, with a wider amplitude for the oldest.