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

Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

849
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...
849
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

974
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
974
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
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

4.5K
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...
4.5K

You might also read

Related Articles

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

Sort by
Same author

Chronic neuroinflammation after acute SARS-Cov-2 infection induces retinal damage in the hACE2 transgenic mouse model.

Journal of neuroimmunology·2026
Same author

Mechanical Pupil Dilation, Posterior Capsule Rupture, and Cystoid Macular Edema in Illuminated Chopper-assisted Cataract Surgery.

Korean journal of ophthalmology : KJO·2026
Same author

Protective role of SIRT1 activation against retinal injury caused by polystyrene micro/nanoplastics exposure.

Environmental pollution (Barking, Essex : 1987)·2026
Same author

Comparison of immediate therapeutic effects of 3% diquafosol and 2% rebamipide in dry eye disease: a prospective, randomized, paired-eye trial.

Scientific reports·2026
Same author

Ocular surface and systemic responses to repeated carbon black exposure across different durations in a rat model.

Environmental pollution (Barking, Essex : 1987)·2026
Same author

Size exchange and vault response in posterior chamber phakic intraocular lens implantation: 12 years at a high-volume center.

Journal of cataract and refractive surgery·2026

Related Experiment Video

Updated: Dec 1, 2025

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
05:46

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

Published on: September 20, 2024

664

Multizonal Design Multifocal Intraocular Lens-Induced Astigmatism According to Orientation.

Youngsub Eom, Seul Ki Yang, Eun Gyu Yoon

    Journal of Refractive Surgery (Thorofare, N.J. : 1995)
    |November 10, 2020
    PubMed
    Summary

    The Precizon Presbyopic NVA intraocular lens (IOL) may induce minor astigmatism based on orientation, but this is clinically insignificant. This study evaluated IOL-induced astigmatism in cataract surgery patients.

    More Related Videos

    Author Spotlight: Enhancing Visual Outcomes in Cataract Surgery: A Novel Technique to Prevent Posterior Capsular Opacification Through IOL Rotation
    04:59

    Author Spotlight: Enhancing Visual Outcomes in Cataract Surgery: A Novel Technique to Prevent Posterior Capsular Opacification Through IOL Rotation

    Published on: July 7, 2023

    2.8K
    Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
    06:55

    Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

    Published on: June 6, 2017

    7.8K

    Related Experiment Videos

    Last Updated: Dec 1, 2025

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
    05:46

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

    Published on: September 20, 2024

    664
    Author Spotlight: Enhancing Visual Outcomes in Cataract Surgery: A Novel Technique to Prevent Posterior Capsular Opacification Through IOL Rotation
    04:59

    Author Spotlight: Enhancing Visual Outcomes in Cataract Surgery: A Novel Technique to Prevent Posterior Capsular Opacification Through IOL Rotation

    Published on: July 7, 2023

    2.8K
    Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
    06:55

    Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

    Published on: June 6, 2017

    7.8K

    Area of Science:

    • Ophthalmology
    • Optics
    • Biomedical Engineering

    Background:

    • Cataract surgery often involves intraocular lens (IOL) implantation.
    • Multifocal IOLs aim to correct refractive errors, but can induce astigmatism.
    • Understanding IOL-induced astigmatism is crucial for visual outcomes.

    Purpose of the Study:

    • To assess astigmatism induced by the Precizon Presbyopic NVA multifocal IOL.
    • To compare induced astigmatism based on the IOL's vertical versus horizontal orientation.
    • To evaluate clinical significance using manifest refraction and simulations.

    Main Methods:

    • Retrospective analysis of 80 eyes from 40 cataract patients implanted with the Precizon Presbyopic NVA IOL.
    • Vector analysis of residual astigmatism measured by autorefraction and manifest refraction.
    • Ray-tracing simulation study modeling pseudophakic eyes and modulation transfer function (MTF).

    Main Results:

    • Autorefraction showed mean IOL-induced astigmatism of 0.68 D (vertical) and 1.05 D (horizontal).
    • Manifest refraction revealed clinically insignificant mean astigmatism of 0.14 D (vertical) and 0.46 D (horizontal).
    • MTF analysis indicated optimal performance in eyes without corneal astigmatism for both IOL orientations.

    Conclusions:

    • The Precizon Presbyopic NVA IOL may induce with-the-rule or against-the-rule astigmatism depending on orientation.
    • This induced astigmatism is not clinically significant based on manifest refraction and simulations.
    • IOL orientation does not appear to be a major factor in clinically relevant astigmatism induction.