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

Visual field testing with red targets.

J S Mindel, A Safir, P W Schare

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |June 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    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

    Interaction of hybrid nanowire-nanoparticle structures with carbon monoxide.

    Nanotechnology·2009
    Same author

    A lost contact lens and Actinomyces colonization in an asymptomatic patient.

    Archives of ophthalmology (Chicago, Ill. : 1960)·2000
    Same author

    Presumed bilateral occipital neurosarcoidosis. A case report.

    Journal of neuro-ophthalmology : the official journal of the North American Neuro-Ophthalmology Society·1998
    Same author

    Is Helicobacter pylori of interest to ophthalmologists?

    Ophthalmology·1997
    Same author

    Congenital Horner's syndrome does not alter Lisch nodule formation.

    Annals of neurology·1994
    Same author

    Failure of controlled clinical trial data to reach the literature.

    Clinical pharmacology and therapeutics·1992

    Red stimuli in visual field testing act as dim white stimuli, but the intensity ratio varies between individuals. This variability, along with dark adaptation effects, impacts the reproducibility of visual field defect measurements.

    Area of Science:

    • Ophthalmology
    • Visual Neuroscience

    Background:

    • Partial temporal visual field defects present diagnostic challenges.
    • Understanding stimulus properties is crucial for accurate visual field assessment.

    Purpose of the Study:

    • To investigate the relationship between chromatic (red) and achromatic (white) stimuli in mapping visual field defects.
    • To assess the impact of dark adaptation on visual field testing reproducibility.

    Main Methods:

    • Ten patients with partial temporal visual field defects were tested using a modified tangent screen perimeter (Auto-Plot).
    • Isopters for red stimulus recognition were compared with those for white stimulus recognition.
    • The effect of dark adaptation over 30 minutes on visual field size was recorded.

    Related Experiment Videos

    Main Results:

    • Red stimuli consistently mapped equivalent visual field defects as dim white stimuli.
    • The red-to-white intensity ratio for equivalent fields was patient-specific (mean 5.7, range 3.0-7.5).
    • Visual fields enlarged during dark adaptation, with greater relative increases in pathological temporal fields, leading to poor reproducibility.

    Conclusions:

    • Red stimulus effectiveness in visual field testing is comparable to dim white light, but with inter-individual variability in intensity ratios.
    • Dark adaptation significantly influences visual field size and reduces test-retest reliability, particularly in pathological areas.