The visual acuity and contrast sensitivity data allow the visual health professional, not only to determine how and how much a person is seeing, but to diagnose, predict and treat alterations of the visual and ocular system, when these are interpreted through starting from reference values. The normal vision of a healthy subject was standardized by Snellen and is based on 20/20, a value that corresponds to a resolution of 30 cycles per degree. In Colombia, the reference values for visual function have been estimated based on parameters found in foreign populations. This descriptive-cross-sectional study identified the reference intervals for VA and CS in the school population between 5 and 19 years of age in the city of Pereira, through the application of tests in healthy subjects. The VA was found to range between -0.20 and 0.10 LogMAR (Logarithm of minimum angle of resolution). The normal range of SC with the MARS Test is between 1.44LogSC and 1.64LogSC (Logarithm of contrast sensitivity). The FSC normality ranges with the CSV1000E test at the spatial frequencies of 3cpd, 6cpd, 12cpd, and 18cpd are 1.49LogSC and 2.08LogSC; 1.70LogSC and 2.29LogSC; 1.40LogSC and 1.99LogSC; 0.96LogSC and 1.55LogSC respectively. It was identified that VA is higher between 15 and 19 years of age and that men have higher VA than women; these differences were not found in CS.