A Bichrome Interpretation Of Stereopsis: Does Chromatcity Affect Stereoacuity Testing?

Background: The purpose of this study is to determine the validity of the bichrome
circles in screening for decreased stereoacuities. Methods: The validity will be determined via a Wilcoxson Signed Rank Test using JMP 5.0 software by SAS analysis of the results of the bichrome circles to the "gold standard" of stereoacuity testing, the stereo fly Wirt rings. Stereoacuities of seventy subjects of normal binocular status were measured with both the bichrome circles and the stereo fly Wirt rings. Results: It was found that the mean stereoacuity as measured with the bichrome circles was greater than the mean as measured with the stereo fly Wirt rings. Conclusion: The stereoacuities of subjects found with the bichrome circles were not correlated with the stereoacuities found with the "gold standard" stereo fly Wirt rings.