The comparative study of Random-Dot and Titmus Stereotest

Abstract

Objective To study the clinical value of Random-Dot Stereotest (global stereopsis) and Titmus Stereotest (local stereopsis).Methods All cases were randomly selected from Epidemiology of 3-15 year old Children with Strabismus,Amblyopia and Refractive Error in Tianjin',including 409 children with normal vision and 210 children with amblyopia.The children's stereopsis was evaluated using Random-Dot Stereograms (RDS) for global stereopsis,and Titmus for local stereopsis.Results from both groups were compared of two forms of the stereopsis distribution of children with normal vision and children with amblyopia.Results The foveal stereopsis of children with normal vision measured with RDS was 74.3%,Titmus 86.3%,and the difference was statistically significant (X~2=18.79,P=0.000).The foveal stereopsis of amblyopic children measured with RDS was 38.6%,Titmus 51.9%,and the difference was statistically significant (X~2=11.87,P=0.008).The detection rate of blindness of stereopsis in amblyopic children with RDS was 12.4%,Titmus 6.2%.Conclusions The stereopsis acuity with RDS is higher than stereopsis acuity with Titmus in children with normal vision,and RDS is better at determining the stereopsis of amblyopic patients. Key words: Random-dot Stereograms; Titmus; Global stereopsis; Local stereopsis