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

4.9K
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...
4.9K
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

3.1K
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
3.1K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

8.4K
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,...
8.4K
Glaucoma: Overview01:25

Glaucoma: Overview

1.1K
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
1.1K
Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

740
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
740

You might also read

Related Articles

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

Sort by
Same author

Body Mass Index is Associated With Direction-Specific Increases in With-the-Rule Corneal and Refractive Astigmatism in Schoolchildren.

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

Low concentration atropine eye drops and progression of myopia in children: multicentre placebo controlled, double masked, randomised trial in the UK (CHAMP-UK).

BMJ (Clinical research ed.)·2026
Same author

Low-concentration atropine for management of myopia progression: does iris colour matter?

Eye (London, England)·2026
Same author

Global Patterns of Myopia, Age, Sex, and Vision Loss: A Comparative Analysis of US and South Korean National Surveys.

Ophthalmology science·2026
Same author

A cost of illness model to estimate the annual societal costs of X-linked retinitis pigmentosa (XLRP) in the United Kingdom (UK).

Current medical research and opinion·2026
Same author

Letter to the Editor: The limitations of centile curves for evaluating myopic eye growth.

Optometry and vision science : official publication of the American Academy of Optometry·2026

Related Experiment Video

Updated: Dec 20, 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

1.5K

Smartphone use as a possible risk factor for myopia.

Saoirse Mccrann1, James Loughman1,2, John S Butler3

  • 1Centre for Eye Research Ireland, School of Physics, Clinical and Optometric Sciences, Technological University Dublin , Dublin, Ireland.

Clinical & Experimental Optometry
|May 27, 2020
PubMed
Summary

This study found a link between myopia and smartphone data usage in students. Increased daily smartphone data consumption is associated with myopia, highlighting a potential risk factor for eye health.

Keywords:
Lifestylemyopiamyopia preventionrisk factorssmartphones

More Related Videos

Smartphone Fundus Photography
05:51

Smartphone Fundus Photography

Published on: July 6, 2017

39.9K
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

3.1K

Related Experiment Videos

Last Updated: Dec 20, 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

1.5K
Smartphone Fundus Photography
05:51

Smartphone Fundus Photography

Published on: July 6, 2017

39.9K
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

3.1K

Area of Science:

  • Ophthalmology
  • Public Health
  • Digital Health

Background:

  • Smartphones represent a potential environmental risk factor for myopia development in children.
  • This research examines student smartphone usage patterns and duration from a myopia perspective.

Purpose of the Study:

  • To investigate the association between smartphone data usage and myopia in students.
  • To identify smartphone usage patterns as a potential risk factor for myopia.

Main Methods:

  • A questionnaire assessed smartphone usage patterns and attitudes toward myopia risk factors in students.
  • Objective device-recorded data usage and self-reported time spent on smartphones were quantified.
  • Refractive status was objectively measured by an optometrist.

Main Results:

  • Over 99% of the 418 participating students owned smartphones.
  • Myopic students used significantly more smartphone data daily (1,130 MB) compared to non-myopes (613 MB).
  • Myopic refractive error was statistically associated with increased daily smartphone data usage, age, and parental myopia.

Conclusions:

  • A significant association exists between myopia and smartphone data usage.
  • Increased smartphone data consumption is a potential risk factor for myopia development and progression.
  • Further research into this relationship is warranted for myopia management strategies.