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

Foveal cone thresholds.

R L Vimal1, J Pokorny, V C Smith

  • 1Eye Research Laboratories, University of Chicago, IL 60637.

Vision Research
|January 1, 1989
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

Influence of laminar flow on preorientation of coal tar pitch structural units: Raman microspectroscopic study.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy·2003
Same author

Museum of history of veterinary medicine, Kosice - Slovakia.

Historia medicinae veterinariae·2003
Same author

[Effect of kainate on the number of NADPH-diaphorase positive neurons in the hippocampus in rats exposed to chronic hypoxia during early ontogenesis].

Ceskoslovenska fysiologie·2003
Same author

Brightness induction from rods.

Journal of vision·2003
Same author

Rod-cone interactions assessed in inferred magnocellular and parvocellular postreceptoral pathways.

Journal of vision·2003
Same author

Expression of serotonin receptors in mouse oocytes and preimplantation embryos.

Physiological research·2003
Same journal

Editorial for VSI Amblyopia: Advances in Amblyopia Research.

Vision research·2026
Same journal

Computational and mathematical models in vision: Quantitative approaches to understanding visual perception.

Vision research·2026
Same journal

Complex interactions between lightness, chroma, and hue in color ensemble perception.

Vision research·2026
Same journal

Driving with autism spectrum disorder: Exploring the impact of tactile hazard warnings on gaze behavior and hazard responses.

Vision research·2026
Same journal

Early visual processing in adults with ADHD: evidence from contrast sensitivity, spatial integration, and external noise.

Vision research·2026
Same journal

Pupil reflexes generate the peripheral drift illusion due to ON/OFF motion responses.

Vision research·2026
See all related articles

This study investigated visual perception, finding that detecting light flashes requires absorbing 5-7 quanta per cone. The research also determined the effective number of cones stimulated by brief light pulses.

Area of Science:

  • Vision science
  • Photoreceptor physiology
  • Psychophysics

Background:

  • Understanding visual perception involves quantifying photoreceptor responses to light.
  • The L/M cone ratio is a key factor in color vision and visual sensitivity.

Purpose of the Study:

  • To estimate psychometric functions for detecting one or two flashes from two light pulses.
  • To determine the quantum catch and cone sampling efficiency in human vision.
  • To measure the L/M cone ratio using psychophysical methods.

Main Methods:

  • Method of constant stimuli to assess visual detection.
  • Presentation of simultaneous 0.5 msec, 1' light pulses separated by 17'.
  • Computer-controlled apparatus for precise foveal stimulation and data acquisition.

Related Experiment Videos

Main Results:

  • Detection thresholds imply 5-7 quanta absorbed per cone are necessary.
  • Effective stimulation of two cones was estimated per light pulse.
  • L/M cone ratios of 1.6 and 4.0 were measured, consistent with heterochromatic flicker photometry.

Conclusions:

  • Visual detection is dependent on a minimum quantum absorption per cone.
  • The number of cones effectively stimulated by brief stimuli can be quantified.
  • Psychophysical measurements provide reliable estimates of cone ratios.