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 Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

3.4K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
3.4K
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

325
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
325
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

6.7K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.7K
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

7.5K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
7.5K
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

26.1K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
26.1K
Light Acquisition02:16

Light Acquisition

8.7K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Mesopic Illumination in Natural Environments: Implications for Myopia Research.

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

Validation of the vision quality of life-time survey: comparison with the convergence insufficiency symptom survey.

Clinical & experimental optometry·2026
Same author

Evaluating the effect of a new myopia control spectacle lens among children in Israel: 24-month results.

Eye (London, England)·2026
Same author

Ophthalmic Emergency Department Visits at a Tertiary Medical Center in Israel: Demographics and Clinical Characteristics Over a Six-Month Period.

Clinical ophthalmology (Auckland, N.Z.)·2026
Same author

Prevalence and Severity of Hypermetropia and Astigmatism Among Druze Children From the Golan Heights.

Journal of ophthalmology·2026
Same author

The Chemical Landscape of the Date Palm (<i>Phoenix dactylifera</i>) Cuticle: A Comprehensive Repertoire of Cutin and Wax Compositions.

Journal of agricultural and food chemistry·2026

Related Experiment Video

Updated: Oct 6, 2025

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

1.2K

Light Intensity in Nursery Schools: A Possible Factor in Refractive Development.

Yuval Cohen1,2, Rafael Iribarren3, Hadas Ben-Eli4,5

  • 1Department of Ophthalmology, Ziv Medical Center, Safed, Israel.

Asia-Pacific Journal of Ophthalmology (Philadelphia, Pa.)
|January 14, 2022
PubMed
Summary

Lower indoor nursery light intensity in preschool children was linked to less hyperopic refractive error. This finding suggests a potential avenue for myopia prevention strategies through light modulation.

More Related Videos

Measuring the Behavioral Effects of Intraocular Scatter
05:10

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

3.5K
Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro
08:16

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro

Published on: March 21, 2015

8.9K

Related Experiment Videos

Last Updated: Oct 6, 2025

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

1.2K
Measuring the Behavioral Effects of Intraocular Scatter
05:10

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

3.5K
Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro
08:16

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro

Published on: March 21, 2015

8.9K

Area of Science:

  • Ophthalmology
  • Pediatric Optometry
  • Environmental Health

Background:

  • Increased outdoor light exposure is causally linked to reduced myopia rates.
  • Understanding indoor light's impact on refractive error is crucial for early-life eye health.

Purpose of the Study:

  • To investigate the association between indoor nursery school light intensity and refractive error in preschool children.
  • To assess if indoor illumination levels influence the refractive status of young children in Israel.

Main Methods:

  • 1596 preschool children (4-5 years) from 27 nursery schools participated.
  • Light intensity was measured in lux indoors and outdoors.
  • Non-cycloplegic refractions were obtained using the PlusOptix A09 screening device.

Main Results:

  • Mean spherical equivalent (SE) was +0.56D (low light), +0.73D (medium light), and +0.89D (high light).
  • Lower light intensity groups showed a higher percentage of children with zero or less refractive error (42.1% vs 19.3%).
  • Significant differences in refractive error across light intensity groups were observed (ANOVA P < 0.001).

Conclusions:

  • Lower indoor illumination levels in nursery schools correlated with less hyperopic refractive error.
  • A reduced hyperopic reserve is a known risk factor for myopia development.
  • Further research is needed to confirm causality and explore light modulation for myopia prevention.