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

Retinal pigmentation, visual acuity and brightness levels.

M J Hoffman

    American Journal of Physical Anthropology
    |November 1, 1975
    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

    Reconstructing cardiac electrical excitations from optical mapping recordings.

    Chaos (Woodbury, N.Y.)·2023
    Same author

    The Rat Genome Database (RGD) facilitates genomic and phenotypic data integration across multiple species for biomedical research.

    Mammalian genome : official journal of the International Mammalian Genome Society·2021
    Same author

    Reconstructing three-dimensional reentrant cardiac electrical wave dynamics using data assimilation.

    Chaos (Woodbury, N.Y.)·2016
    Same author

    Prediction: A six-year follow-up.

    Annals of dyslexia·2013
    Same author

    Prosthetic valve/conduit infection caused by Cardiobacterium valvarum.

    Infection·2010
    Same author

    Neuraxial labor analgesia in an obese parturient with influenza A H1N1.

    International journal of obstetric anesthesia·2010
    Same journal

    A geometric morphometric assessment of shape variation in adult pelvic morphology.

    American journal of physical anthropology·2021
    Same journal

    Corrigendum: Infanticide in chimpanzees: Taphonomic case studies from Gombe.

    American journal of physical anthropology·2021
    Same journal

    Sexual dimorphism in the size and shape of the non-obstetric pelvis across anthropoids.

    American journal of physical anthropology·2021
    Same journal

    The biological index of frailty: A new index for the assessment of frailty in human skeletal remains.

    American journal of physical anthropology·2021
    Same journal

    Mass violence in Copper Age Europe: The massacre burial site from Potočani, Croatia.

    American journal of physical anthropology·2021
    Same journal

    Skeletal evidence of structural violence among undocumented migrants from Mexico and Central America.

    American journal of physical anthropology·2021
    See all related articles

    Retinal pigmentation does not affect visual acuity in environments like deserts or snowfields. Further research is needed at higher brightness levels to confirm these findings on human eye adaptation.

    Area of Science:

    • Ophthalmology
    • Human Physiology
    • Environmental Adaptation

    Background:

    • Human visual acuity is crucial for survival in diverse environments.
    • Optically stressful environments, such as deserts and snowfields, pose unique challenges to vision.
    • Retinal pigmentation is hypothesized to play a role in adapting visual acuity to these conditions.

    Purpose of the Study:

    • To investigate the adaptive role of human retinal pigmentation in maintaining visual acuity.
    • To test the hypothesis that greater retinal pigmentation enhances vision in bright, optically stressful environments.

    Main Methods:

    • Ophthalmoscopic examination to estimate retinal pigmentation degree in 84 subjects.
    • Testing binocular visual acuity across ten distinct brightness levels.

    Related Experiment Videos

  • Comparing mean pupil size at various illumination levels based on pigmentation groups.

    • Main Results:

    • No significant influence of general retinal pigmentation on mean visual acuity was found across tested brightness levels.
    • No difference in mean pupil size was observed between individuals with varying degrees of retinal pigmentation under different light conditions.
    • The initial hypothesis was rejected based on the current study's parameters.

    Conclusions:

    • The degree of retinal pigmentation does not appear to be a significant factor in maintaining visual acuity in optically stressful environments within the tested brightness range.
    • Further investigation with higher illumination levels is recommended to fully assess the adaptive hypothesis.
    • Pupil size regulation is independent of retinal pigmentation levels in response to varying illumination.