Senses — What u see? Vision screening system dedicated for iOS based devices development and screening results

This paper describes a design and implementation of the vision screening system dedicated for iOS (iPhone/iPad/iPod Operating System) based devices. The aim of the system is to promote and popularize the vision tests, especially among children and youth. The examination consists of color vision and contrast differentiation tests. After the examination the system automatically evaluates users´ answers and generates the results. Test data are anonymously sent to the server allowing for a detailed analysis. The paper contains analysis of the results on the population of about 3800 people. Presented data show that vision problems concern about half of users. The analysis was divided into two age groups (pre-school children and older) and two types of eye disorders - vision acuity and perceptions of colors including Dalton testing. Test for the first age group has been adapted to examine people with special educational needs.