Evaluation of Clinical Stereopsis Tests

Supa Kongsangchai Bsc.
Prut Hanutsaha M.D.
Department of Ophthalmology, Faculty of Medicine, Ramathibodi Hospital, Mahidol Universiy

ABSTRACT

Purpose The authors compared the results of three stereopsis tests.

Methods Three commercial stereopsis tests: the Randot Stereotests, the Stereotests, and the TNO test; were done in 54 patients. The indusion criteria were: (1) age of 5 years or over, (2) best corrected VA atf 20/50 or better, (3) possession of fusional ability.

Results All patients had some degree of stereopsis tested by the Randot Stereotests or the Stereo tests. Six patients (11.11%) had no stereopsis when tested by the TNO test (false negative) The degree of stereopsis results from all three tests were correlated with statistical significance.

Conclusion All three tests are correlated but the TNO test has 11% false negative result.