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...

Glaucoma: Overview

Glaucoma: Overview

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...

Accessory Structures of the Eye

Accessory Structures of the Eye

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...

Photoreceptors and Visual Pathways

Photoreceptors and Visual Pathways

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, whereas...

Open Angle Glaucoma: Treatment

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...

You might also read

Related Articles

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

Sort by

Same author

Bilateral Cochlear Implantation in Pediatric Neurobrucellosis Complicated by Profound Sensorineural Hearing Loss and Complete Vision Loss.

The journal of international advanced otology·2026

Same author

Molecular Genetic Confirmation of Jaffe-Campanacci Syndrome: A Case Report of the Third Identified Pathogenic <i>NF1</i> Variant.

Molecular syndromology·2026

Same author

Neonatal-onset genetic epilepsies: Insights from a large multicentre cohort.

Seizure·2026

Same author

Surgical decision-making in cholesteatoma-induced labyrinthine fistula: hearing outcomes in a tertiary referral center.

European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·2026

Same author

Evaluation of Extended Indications for Cochlear Implantation Beyond Conventional Criteria.

Turkish archives of otorhinolaryngology·2026

Same author

Comparing the Accuracy of 4 Artificial Intelligence Models in PubMed Citation Generation for Glaucoma Research.

Journal of glaucoma·2026

Search research articles

Related Experiment Video

Updated: Jul 6, 2026

$Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter$

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

The correlation between headache and refractive errors.

Arsen Akinci¹, Alev Güven, Aydan Degerliyurt

¹Diskapi Children's Hospital, Department of Pediatric Ophthalmology, Ankara, Turkey. arsenakinci@yahoo.com

Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus

|March 11, 2008

Summary

Patients with headache showed a higher prevalence of refractive errors, particularly astigmatism and anisometropia. This study highlights a significant association between headache and vision problems, including miscorrected refractive errors.

More Related Videos

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

Related Experiment Videos

Last Updated: Jul 6, 2026

$Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter$

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

Area of Science:

Ophthalmology
Neurology
Pediatrics

Background:

Refractive errors are common vision impairments.
Headache is a prevalent neurological symptom with various underlying causes.
The relationship between refractive errors and headache requires further investigation.

Purpose of the Study:

To compare the prevalence of refractive errors in individuals experiencing headaches versus a control group.
To identify specific types of refractive errors associated with headache.

Main Methods:

Retrospective evaluation of 310 patients with headache and 843 controls.
Comprehensive ophthalmologic examinations and cycloplegic autorefraction.
Defined myopia, hyperopia, and astigmatism based on established criteria; analyzed anisometropia and prior miscorrection.

Main Results:

Higher overall prevalence of refractive errors in the headache group (p = 0.002).
Increased rates of astigmatism (p < 0.0001), compound astigmatism (p = 0.026), and mixed astigmatism (p < 0.001) in headache patients.
Significantly higher rates of anisometropia and previous refractive error miscorrection in the headache group (p < 0.0001 for both).

Conclusions:

Patients with headache exhibit a greater frequency of astigmatism, anisometropia, and miscorrected refractive errors.
Headache is associated with an increased risk of total refractive errors, anisometropia, and miscorrection.
These findings suggest a potential link between visual system anomalies and headache.