Real depth vs randot stereotests

Am J Ophthalmol. 2006 Oct;142(4):699-701. doi: 10.1016/j.ajo.2006.04.065.


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.

Publication types

  • Comparative Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Child
  • Child, Preschool
  • Depth Perception / physiology*
  • Humans
  • Middle Aged
  • Strabismus / physiopathology*
  • Vision Tests
  • Vision, Binocular / physiology*
  • Visual Acuity / physiology