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

Temporal summation and perimetry.

C E Krakau1

  • 1Department of Experimental Ophthalmology, University Eye Clinic, Malmö, Sweden.

Ophthalmic Research
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

Retinal summation capability, or

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

Spotting of disc haemorrhages on fundus pictures; on Kodachrome slides and on digitally enhanced images.

Acta ophthalmologica Scandinavica·2000
Same author

A computerised adaptometer.

Acta ophthalmologica Scandinavica·1998
Same author

An instrument for recording the ocular pulse wave.

Acta ophthalmologica Scandinavica·1995
Same author

A model for pulsatile and steady ocular blood flow.

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie·1995
Same author

Disk hemorrhages and retinal vein occlusions in glaucoma.

Survey of ophthalmology·1994
Same author

Arguments for a vascular glaucoma etiology.

Acta ophthalmologica·1993
Same journal

Retraction Statement.

Ophthalmic research·2026
Same journal

Correlations between Clinical Activity Score and Serological and Radiological Data in Treatment-naïve Ethnic Han Chinese Thyroid Eye Disease.

Ophthalmic research·2026
Same journal

Stem Cell Based Interventions for Retinal Ganglion Cell Protection and Regeneration in Glaucoma: A Review of Current Evidence and Future Directions.

Ophthalmic research·2026
Same journal

Eye-Tracking Reading Patterns as Correlates of Clinical Measures in Glaucoma.

Ophthalmic research·2026
Same journal

A Matching-Adjusted Comparison of Faricimab and Aflibercept 8 mg in Neovascular Age-Related Macular Degeneration and Diabetic Macular Edema.

Ophthalmic research·2026
Same journal

Ab Externo Continuous Pressure Technique for Descemet Membrane Endothelial Keratoplasty in Vitrectomized Eyes.

Ophthalmic research·2026
See all related articles

Area of Science:

  • Ophthalmology
  • Visual Neuroscience
  • Psychophysics

Background:

  • Perimetry is crucial for diagnosing visual field defects.
  • Understanding retinal processing of visual stimuli is key to interpreting perimetry results.
  • The effect of stimulus exposure time on visual threshold sensitivity is not fully elucidated.

Purpose of the Study:

  • To experimentally determine threshold sensitivity as a function of test object exposure time.
  • To quantify retinal summation capability using a 'memory' function.
  • To explain the mechanism behind the effacement of visual field defects with prolonged exposure.

Main Methods:

  • Experimental determination of threshold sensitivity.
  • Modeling retinal summation as an exponential decay function.

Related Experiment Videos

  • Utilizing convolution integrals to find efficient stimuli.
  • Developing a hypothetical model based on optic nerve fiber rarefaction.

    • Main Results:

    • Threshold sensitivity is dependent on stimulus exposure time.
    • Retinal summation capability can be modeled as a decaying 'memory' function.
    • Efficient stimuli result from the convolution of memory and light stimulus functions.
    • Prolonged exposure time effaces relative visual field defects.

    Conclusions:

    • Retinal summation exhibits an approximately exponential decay.
    • A model involving optic nerve fiber rarefaction explains the effacement of defects.
    • This research provides insights into visual processing during perimetry.