Snellen visual acuity versus spatial frequency of preferential looking test

Abstract

Visual acuity measured with Snellen and preferential looking test is used to determine quantitatively the ability of the visual system to discriminate the details from an early age to adulthood. Although mathematically cycles per degree of preferential looking test and Snellen fraction are comparable, must also be taken into account other factors in the person as perceptual, and the development of ocular structures of the individual as well as other relevant factors where physical and environmental tests are performed, such as lighting.