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

The Pulfrich effect in optometric practice

G Heron1, M McQuaid, E Morrice

  • 1Department of Vision Sciences, Glasgow Caledonian University, UK.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|September 1, 1995
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

INTRODUCING EXTENDED VENOUS THROMBOEMBOLISM PROPHYLAXIS FOR HIGH-RISK VASCULAR PATIENTS UNDERGOING LOWER LIMB AMPUTATION - A QUALITY IMPROVEMENT PROJECT.

The Ulster medical journal·2021
Same author

Oral propranolol for infantile haemangioma may be associated with transient gross motor delay.

The British journal of dermatology·2018
Same author

Assessment of the Apple iPad as a low-vision reading aid.

Eye (London, England)·2017
Same author

Winners in the 2012 Naylor prize competition.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2013
Same author

Impact of sediment-bound iron on redox buffering in a landfill leachate polluted aquifer (vejen, denmark).

Environmental science & technology·2011
Same author

Oxidation capacity of aquifer sediments.

Environmental science & technology·2011
Same journal

Mesopic Illumination in Natural Environments: Implications for Myopia Research.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Axial Length Growth Reference Curves and LMS Parameters for Japanese Children and Adolescents Aged 4-20 Years: The TMM BirThree Cohort Study.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Effect of Switching Myopia Control Strategies on Axial Elongation in Children with Poor Response to Highly Aspherical Lenslet Therapy.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Quantifying the Role of Longitudinal Chromatic Aberration and Age in Night Vision Disturbances.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Impaired Rod-Mediated Vision is the Functional Hallmark of Ageing and Early and Intermediate Age-Related Macular Degeneration.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same journal

Analytical Performance, Spatial Dynamics and Clinically Meaningful Change Thresholds for Automated Non-invasive Tear Film Assessment Using the Oculus Keratograph 5M.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
See all related articles

The Pulfrich effect, a visual misperception, can occur with unequal pupil sizes or tints. This study confirms its presence in anisocoria, uniocular mydriasis, and with X-chrom lenses, warning of potential driving risks.

Area of Science:

  • Ophthalmology
  • Visual Neuroscience

Background:

  • The Pulfrich effect causes visual perception changes due to interocular latency differences.
  • Symptoms include object mislocalization, particularly hazardous during driving.
  • Such latency differences can be unintentionally induced in clinical practice.

Purpose of the Study:

  • To investigate the Pulfrich effect in conditions like anisocoria, uniocular mydriasis, and with uniocular tint (X-chrom lens).
  • To compare the magnitude of the induced Pulfrich effect with that caused by neutral density filters.

Main Methods:

  • Experimental induction of the Pulfrich effect using anisocoria, uniocular mydriasis, and a uniocular X-chrom lens.
  • Quantitative comparison of the effect's magnitude against neutral density filters.

Related Experiment Videos

Main Results:

  • A consistent Pulfrich effect was observed in all tested conditions (anisocoria, uniocular mydriasis, X-chrom lens).
  • The induced Pulfrich effect magnitude was comparable to previously reported cases, including trauma-induced instances.
  • The study found the Pulfrich effect to be consistently evident across these induced conditions.

Conclusions:

  • Clinical practices inducing interocular latency differences, such as uniocular mydriasis, can provoke a significant Pulfrich effect.
  • Healthcare professionals should exercise caution when contemplating procedures that may induce this effect.
  • Patients undergoing uniocular mydriasis should be warned about potential visual disturbances and advised against driving until pupil symmetry is restored.