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

Effects of continuous light on experimental refractive errors in chicks

S S Guo1, J G Sivak, M G Callender

  • 1School of Optometry, University of Waterloo, Ontario, Canada.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|November 1, 1996
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

Corrigendum to "Responses of intestinal morphology, immunity, antioxidant status and cecal microbiota to the mixture of glycerol monolaurate and cinnamaldehyde in laying hens" [Poultry Science 103 (2024) 103645].

Poultry science·2025
Same author

Magnetic-vortex nanodonuts enhance ferroptosis effect of tumor ablation through an imaging-guided hyperthermia/radiosensitization strategy.

iScience·2024
Same author

Responses of intestinal morphology, immunity, antioxidant status and cecal microbiota to the mixture of glycerol monolaurate and cinnamaldehyde in laying hens.

Poultry science·2024
Same author

Lonicera flos and Cnicus japonicus extracts improved egg quality partly by modulating antioxidant status, inflammatory-related cytokines and shell matrix protein expression of oviduct in laying hens.

Poultry science·2023
Same author

Research Note: Disturbance of intracellular calcium signal in salpingitis simulation of laying hens.

Poultry science·2022
Same author

Effects of salpingitis simulation on the morphology and expression of inflammatory-related genes of oviduct in laying hens.

Poultry science·2022

Continuous light partially suppresses experimental refractive errors in chicks. Form deprivation and lens-induced defocus still caused myopia and hyperopia, but to a lesser extent than in normal light conditions.

Area of Science:

  • Ophthalmology
  • Developmental Biology
  • Animal Models

Background:

  • Experimental induction of ametropias (refractive errors) is possible in developing chick eyes.
  • Continuous light exposure can alter chick eye refractive properties.
  • The combined effects of light conditions and visual manipulations on eye development are not fully understood.

Purpose of the Study:

  • To investigate the impact of continuous light on experimental refractive error development in chicks.
  • To determine if form deprivation and retinal defocus can still induce myopia and hyperopia under continuous light.
  • To assess the interaction between visual environment and induced ametropias.

Main Methods:

  • Newly hatched chicks (n=31) were raised for 2 weeks under continuous light.

Related Experiment Videos

  • One eye of each chick was fitted with translucent goggles or +/- 10 diopter lenses.
  • Refractive state, corneal curvature, and intraocular dimensions were measured periodically using retinoscopy, keratometry, and A-scan ultrasound.

    • Main Results:

    • Continuous light with form deprivation or -10D lenses induced myopia; +10D lenses induced hyperopia by day 4.
    • After 2 weeks, all treated eyes became hyperopic due to corneal flattening.
    • Treated eyes showed relative myopia (-3.8D goggle, -2.8D -10D) or increased hyperopia (+5.1D +10D) compared to controls.
    • Axial length increased with goggles/-10D lenses and decreased with +10D lenses.

    Conclusions:

    • Form deprivation and retinal defocus can still induce experimental refractive errors in chicks under continuous light.
    • Continuous light partially suppresses the effects of these visual manipulations.
    • The chick eye's refractive development is influenced by both visual input and light environment.