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

Continuous ambient lighting and eye growth in primates.

E L Smith1, D V Bradley, A Fernandes

  • 1College of Optometry, University of Houston, 4901 Calhoun Boulevard, Houston, TX 77204-6052, USA. opto33@jetson.uh.edu

Investigative Ophthalmology & Visual Science
|May 1, 2001
PubMed
Summary

Continuous light exposure in infant monkeys did not cause abnormal ocular growth. However, some variations in emmetropization suggest constant light may impact visual development differently than a light/dark cycle.

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

Cross-sectional survey of resistant priority pathogen carriage in the hospital setting in Timor-Leste 2020-2021.

Antimicrobial resistance and infection control·2026
Same author

Energy Spectrum of Ultrahigh-Energy Cosmic Rays across Declinations -90° to +44.8° as Measured at the Pierre Auger Observatory.

Physical review letters·2026
Same author

Search for the Anomalous Events Detected by ANITA Using the Pierre Auger Observatory.

Physical review letters·2025
Same author

Inference of the Mass Composition of Cosmic Rays with Energies from 10^{18.5} to 10^{20}  eV Using the Pierre Auger Observatory and Deep Learning.

Physical review letters·2025
Same author

From fixing to connecting: parents' experiences supporting adult children with eating disorders.

Journal of eating disorders·2024
Same author

Cannabinoid type 2 receptor inhibition enhances the antidepressant and proneurogenic effects of physical exercise after chronic stress.

Translational psychiatry·2024

Area of Science:

  • Ophthalmology
  • Developmental Biology
  • Primate Research

Background:

  • Infant eye development and emmetropization are crucial for visual acuity.
  • Previous studies in chickens showed altered ocular growth with continuous light exposure.
  • Understanding the impact of light cycles on primate eye development is important.

Purpose of the Study:

  • To investigate the effects of continuous light on ocular growth and emmetropization in infant rhesus monkeys.
  • To compare primate responses to light-reared chickens.
  • To assess potential differences in visual development under constant light conditions.

Main Methods:

  • Infant rhesus monkeys (n=9) were exposed to continuous light for 6 months.
  • Ocular parameters were measured using cycloplegic retinoscopy, keratometry, and A-scan ultrasonography.

Related Experiment Videos

  • Control data from 23 normally reared infant monkeys were used for comparison.

    • Main Results:

    • No significant differences in ocular growth or dimensions were observed between continuous light-exposed and control monkeys.
    • Most experimental monkeys developed typical hyperopic refractive errors.
    • Three monkeys showed unusual emmetropization, including myopia and anisometropia.

    Conclusions:

    • Constant light exposure in infant primates does not induce the same ocular changes seen in light-reared chickens.
    • Variations in emmetropization in some infants may be due to individual differences.
    • The emmetropization process might be less effective under constant light compared to a normal light/dark cycle.