A Comparative Assessment of the Lang, T.N.O. and Titmus Stereo Tests
Robyn Johnstone, DipAppSc (Cumb), DOBA
Shayne Brown, DipAppSc(Cumb), DOBA
The Lang stereo test was assessed. This test is based on the combination of the random dot stereogram and the panagraphic technique of Hess. It allows for rapid examination of stereopsis without the use of glasses and with only a minimum amount of co-operation and comprehension from the patient. The new Lang stereo test is compared with the T.N.O. and Titmus tests in children between the ages of 3 months and 12 years of age. Four groups of children were assessed.
- a control group of children with no apparent ocular defects
- a group of infants with no apparent ocular defects
- a group of children with moderate anisometropic amblyopia
- a group of children microtropia
The results show that the Lang test is a superior screening test for infants; it is a comparable screening test for anisometropic amblyopia and a superior screening test for microtropia.
