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.
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