Vizassess: A Computer Generated Test of Visual Function

Kerry Fitzmaurice, DipAppSci (Orth), DOBA
Y Chen, BScHons (Fudan University, China)\
 
Assessment of the visual function of children with severe intellectual disability or gross developmental delay is a challenging and difficult task.  Conventional tests of visual function are inappropriate and generally unsuccessful. Clinicians are often forced to rely on assessments which are of limited interest to the child and do not provide a quantitative result. Vizassess is a software package developed to determine the presence of vision and where possible a measure based on the standard Snellen fraction. The test presents a range of familiar images constructed in Snellen equivalent sizes. Movement and image manipulation are used to attract attention and facilitate non-verbal responses. Clinical trials indicate the test is reliable and able to be used with some of the children incapable of response to conventional tests of vision.