Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Focusing of Light in the Eye

Focusing of Light in the Eye

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...

You might also read

Related Articles

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

Sort by

Same author

Eye Focusing Ability Can Predict Glycated Hemoglobin Level of Type-1 Diabetes Patients.

Health science reports·2025

Same author

Impact of uncorrected refractive errors on eye-related quality of life and functional vision in a cohort of African children.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2025

Same author

Real-world outcomes of Defocus Incorporated Multiple Segments lenses on retarding axial elongation in myopic children and adolescents.

Frontiers in medicine·2025

Same author

Intraocular Pressure Response to Perceived Stress in Juvenile-Onset Open Angle Glaucoma.

Journal of glaucoma·2024

Same author

Coenzyme Q10 eyedrops conjugated with vitamin E TPGS alleviate neurodegeneration and mitochondrial dysfunction in the diabetic mouse retina.

Frontiers in cellular neuroscience·2024

Same author

Age-related driving mechanisms of retinal diseases and neuroprotection by transcription factor EB-targeted therapy.

Neural regeneration research·2024

Search research articles

Related Experiment Video

Updated: Mar 27, 2026

$Subjective Refraction Test Using a Smartphone for Vision Screening$

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

The Potential of Self-Controlled Focus for Myopia Prevention: A Pilot Study Using a Mobile Phone.

Samuel Abokyi^1,2,3,4,5,6, Rachel K M Chun^1,2,3,4,5, Elie A J de Lestrange-Anginieur^1,2,3,4,5

¹School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong.

Translational Vision Science & Technology

|March 25, 2026

Summary

Self-controlled focus reading significantly reduced hyperopic retinal defocus and eye elongation in near-emmetropes. This finding suggests potential for myopia prevention and control strategies in children.

More Related Videos

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Published on: March 24, 2020

Inducement and Evaluation of a Murine Model of Experimental Myopia

Inducement and Evaluation of a Murine Model of Experimental Myopia

Published on: January 22, 2019

Related Experiment Videos

Last Updated: Mar 27, 2026

$Subjective Refraction Test Using a Smartphone for Vision Screening$

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Published on: March 24, 2020

Inducement and Evaluation of a Murine Model of Experimental Myopia

Inducement and Evaluation of a Murine Model of Experimental Myopia

Published on: January 22, 2019

Area of Science:

Ophthalmology and Vision Science
Myopia Research
Visual Optics

Background:

Hyperopic retinal defocus is a risk factor for myopia progression.
Understanding the ocular response to visual tasks is crucial for myopia control.
Self-controlled focus mechanisms may offer novel approaches to manage visual demands.

Purpose of the Study:

To investigate the short-term ocular impacts of reading using self-controlled focus.
To assess changes in refractive error, axial length, and choroidal thickness.
To evaluate the behavioral effects of self-controlled defocus during reading.

Main Methods:

Thirteen near-emmetropic participants read for 30 minutes using self-adjusted eyeglasses (SAG) or plano eyeglasses (PE) with a ToF sensor.
Ocular parameters (SER, AxL, ChT) were measured before and after reading.
Reading distance, speed, and dioptric correction dynamics were continuously monitored.

Main Results:

Self-adjusted focus significantly reduced hyperopic retinal defocus (-1.12 D) and increased working distance (75.96 mm).
Reduced defocus in SAG led to decreased axial length elongation (9 µm) and SER change (-0.17 D).
Choroidal thickness showed significant association with dioptric dynamics, not lens correction.

Conclusions:

Self-controlled defocus during reading induces significant short-term ocular changes.
This approach shows potential for reducing hyperopic defocus, relevant for myopia prevention.
Further research is needed to explore long-term effects and individual behavioral interactions.