Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

A new stereotest: the double two rod test

W C Fan1, B Brown, M K Yap

  • 1Department of Optometry and Radiography, Hong Kong Polytechnic University, Hung Hom, Hong Kong.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|May 1, 1996
PubMed
Summary

The new double two rod test reliably measures stereoacuity. Short viewing times (<3s) significantly reduce stereoacuity, while more comparisons do not improve it.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Cardiovascular magnetic resonance to differentiate veteran athlete's heart with cavity dilatation and mild dilated cardiomyopathy.

European heart journal. Cardiovascular Imaging·2025
Same author

Neutral pressure measurement in TCV tokamak using ASDEX-type pressure gauges.

The Review of scientific instruments·2025
Same author

Clinical validation of a tissue-agnostic genome-wide methylome enrichment molecular residual disease assay for head and neck malignancies.

Annals of oncology : official journal of the European Society for Medical Oncology·2024
Same author

12/15-Lipoxygenases mediate neuropathic-like pain hypersensitivity in female mice.

bioRxiv : the preprint server for biology·2024
Same author

Shock first, ask questions later….

Acute medicine·2022
Same author

Opportunities to improve the impact of two national clinical audit programmes: a theory-guided analysis.

Implementation science communications·2022

Area of Science:

  • Vision science
  • Ophthalmology
  • Psychophysics

Background:

  • Stereoacuity, the ability to perceive depth with two eyes, is crucial for visual tasks.
  • Existing stereoacuity tests vary in methodology and sensitivity.
  • Understanding factors affecting stereoacuity, such as viewing time and comparison number, is important for accurate assessment, especially in aging populations.

Purpose of the Study:

  • To introduce and validate a new stereoacuity test, the double two rod test.
  • To investigate the impact of viewing time and the number of comparisons on stereoacuity.
  • To compare the effectiveness of binocular cues versus monocular cues in depth perception.

Main Methods:

  • Development of the double two rod test utilizing a two-alternative forced-choice (2AFC) paradigm.

Related Experiment Videos

  • Measurement of stereoacuity thresholds under binocular and monocular viewing conditions.
  • Systematic variation of viewing time (e.g., <3s vs. longer) and the number of rod pair comparisons.

    • Main Results:

    • The double two rod test demonstrated repeatable results.
    • Binocular stereoacuity significantly outperformed monocular stereoacuity, indicating the dominance of binocular disparity.
    • Stereoacuity was significantly reduced for viewing times under 3 seconds; longer viewing times offered no additional benefit.
    • The number of comparisons made between rod pairs did not influence stereoacuity outcomes.

    Conclusions:

    • The double two rod test is a reliable tool for assessing stereoacuity.
    • Brief viewing durations (under 3s) impair stereoacuity, highlighting the importance of adequate viewing time.
    • Binocular disparity is a far more significant contributor to depth perception than monocular cues.