A new system for the ocular motility measurement using a personal computer

Abstract

An evaluation of the operative features of a new computerized application PC Hess for the measurement of ocular motility using a personal computer is described. <em><strong>Objective:</strong></em> to determine the operative characteristics of the PC Hess computerized application in comparison with the Hess-Lancaster screen in strabismic and non strabismic patients. Methodology: a prototype of the application has been evaluated in a clinical environment on a sample of 73 patients that came to optometric and ophthalmologic centers in Colombia with and without oculomotor problems, and compared with a traditional Hess-Lancaster screen. All patients were evaluated with the two tests with an interval of 15 minutes. A sensitivity and specificity test was done for the computerized application and the Pearson correlation values for normal data were measured in the different points of evaluation of the test. <em><strong>Results:</strong></em> in general terms, the shapes of the oculomotor fields obtained using the two instruments were similar, but the computerized application tended to measure a slightly converged displacement in comparison with Hess-Lancaster screen and to record larger deviations. However, the diagnostic value of the instruments was similar and the sensitivity and especificity value for the application were 1. <em><strong>Conclusion:</strong></em> the computerized application PC Hess is a viable alternative to the traditional Hess-Lancaster Screen.