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...

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...

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...

You might also read

Related Articles

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

Sort by

Same author

The Relation of Ocular Surface Irregularity and Visual Disturbance in Early Stage Acanthamoeba Keratitis.

Eye & contact lens·2016

Same author

Reply: intraocular lens power calculation after photorefractive surgery: modified double-K method.

Journal of cataract and refractive surgery·2013

Same author

Postoperative flat anterior chamber: incidence, risk factors, and effect on the long-term success of trabeculectomy.

Japanese journal of ophthalmology·2013

Same author

Expression and localization of aging markers in lacrimal gland of chronic graft-versus-host disease.

Scientific reports·2013

Same author

Long-term maintenance of limbal epithelial progenitor cells using rho kinase inhibitor and keratinocyte growth factor.

Stem cells translational medicine·2013

Same author

ABCA4 gene screening by next-generation sequencing in a British cohort.

Investigative ophthalmology & visual science·2013

Search research articles

Related Experiment Video

Updated: Jul 18, 2026

Press Needle: A Traditional Chinese Medicine Therapy for Myopia Patients with Dry Eye

Press Needle: A Traditional Chinese Medicine Therapy for Myopia Patients with Dry Eye

Published on: April 12, 2024

Optical aberrations and visual disturbances associated with dry eye.

Eiki Goto¹, Reko Ishida, Minako Kaido

¹Department of Ophthalmology, School of Dental Medicine, Tsurumi University, Yokohama, Japan. goto-e@tsurumi-u.ac.jp

The Ocular Surface

|December 6, 2006

Summary

New devices, functional visual acuity (FVA) and tear stability analysis system (TSAS), effectively measure dynamic visual function in dry eye disease. These tools assess visual disturbances and aid in evaluating treatment outcomes for improved daily activities.

More Related Videos

Clinical Application of Intense Pulsed Light Therapy and Radio Frequency for Treatment of Ocular Surface Diseases

Clinical Application of Intense Pulsed Light Therapy and Radio Frequency for Treatment of Ocular Surface Diseases

Published on: July 3, 2025

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation

Published on: November 11, 2025

Related Experiment Videos

Last Updated: Jul 18, 2026

Press Needle: A Traditional Chinese Medicine Therapy for Myopia Patients with Dry Eye

Press Needle: A Traditional Chinese Medicine Therapy for Myopia Patients with Dry Eye

Published on: April 12, 2024

Clinical Application of Intense Pulsed Light Therapy and Radio Frequency for Treatment of Ocular Surface Diseases

Clinical Application of Intense Pulsed Light Therapy and Radio Frequency for Treatment of Ocular Surface Diseases

Published on: July 3, 2025

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation

Published on: November 11, 2025

Area of Science:

Ophthalmology
Optometry
Vision Science

Background:

Dry eye disease is linked to optical aberrations and visual disturbances not always detected by standard visual acuity tests.
Conventional testing may not fully capture the impact of dry eye on functional vision and daily tasks.

Purpose of the Study:

To introduce and evaluate novel devices for assessing dynamic visual function in dry eye.
To determine the effectiveness of new measurement systems in detecting visual changes related to dry eye.

Main Methods:

Utilized a functional visual acuity (FVA) device for continuous, dynamic evaluation of distance visual acuity.
Employed a tear stability analysis system (TSAS) to detect corneal surface irregularities during sustained eye opening.

Main Results:

Both FVA and TSAS systems demonstrated effectiveness in assessing dynamic visual acuity changes in both dry eye and normal subjects.
These novel methods proved beneficial in evaluating the outcomes of dry eye disease management.

Conclusions:

FVA and TSAS are valuable tools for assessing dynamic visual function and corneal surface irregularities in dry eye.
FVA testing correlates with an individual's performance in daily activities like driving and reading, highlighting its clinical relevance.