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  • Title: Real depth vs randot stereotests.
    Author: Leske DA, Birch EE, Holmes JM.
    Journal: Am J Ophthalmol; 2006 Oct; 142(4):699-701. PubMed ID: 17011876.
    Abstract:
    PURPOSE: To compare the performance of real depth and Randot stereotests in strabismic and nonstrabismic patients. DESIGN: Observational case series. METHODS: Stereoacuity was tested in 182 patients with a variety of strabismic conditions, using the Frisby-Davis 2 (FD2) distance stereotest, the near Frisby (nF) (both real depth tests), the Preschool Randot (nR), and Distance Randot (dR) tests (both based on Polaroid vectographs). RESULTS: Patients appreciated finer disparities with the nF test than the nR test at near and with the FD2 test than the dR test at distance. CONCLUSIONS: The type of stereotest influences measurable thresholds, and the results from different tests are not interchangeable. The choice of test should depend on the question being asked; nF and FD2 would be appropriate for determining presence or absence of stereopsis and best measurable stereopsis. The more rigorous Randot tests would be appropriate for determining subtle changes.
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