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

Robust estimates of biodiversity change require high-resolution time series.

Nature communications·2026

Same author

Forging ophthalmology in Puerto Rico: Dr Ramón Emeterio Betances (1827-1898).

Journal of medical biography·2026

Same author

Fania (Fanny) Kaplan and the attempted assassination of Vladimir Lenin: Ophthalmologic considerations.

Acta ophthalmologica·2026

Same author

Current protected areas provide limited benefits for European river biodiversity.

Nature communications·2025

Same author

Editorial for Special Issue "Ophthalmology: New Diagnostic and Treatment Approaches".

Medicina (Kaunas, Lithuania)·2025

Same author

Dorothy Tiffany Burlingham and the psychology of the congenitally blind child.

BMJ open ophthalmology·2025

Search research articles

Related Experiment Video

Updated: May 3, 2026

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

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

Published on: September 20, 2024

Postoperative refraction in the second eye having cataract surgery.

Christopher T Leffler¹, Martin Wilkes², Juliana Reeves¹

¹Eye Clinic 112, Ophthalmology Section, Hunter Holmes McGuire VA Medical Center, 1201 Broad Rock Boulevard, Richmond, VA 23249, USA ; Department of Ophthalmology, Virginia Commonwealth University School of Medicine, P.O. Box 980438, 401 North 11th Street, Richmond, VA 23298, USA.

ISRN Ophthalmology

|February 18, 2014

Summary

The observed refraction in the first eye after cataract surgery is a key predictor for the second eye's outcome. This finding improves refractive prediction accuracy compared to relying solely on predicted refractions.

More Related Videos

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

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

Published on: September 16, 2025

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Published on: February 15, 2022

Related Experiment Videos

Last Updated: May 3, 2026

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

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

Published on: September 20, 2024

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

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

Published on: September 16, 2025

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Published on: February 15, 2022

Area of Science:

Ophthalmology
Refractive Surgery

Background:

Cataract surgery studies often assume equal importance of predicted and observed first-eye refractions for second-eye outcomes.
Accurate refractive prediction is crucial for patient satisfaction after bilateral sequential cataract surgery.

Purpose of the Study:

To evaluate the predictive value of first-eye postoperative refraction for second-eye outcomes.
To compare a new predictive model with the SRK-T formula for refractive accuracy.

Main Methods:

Retrospective analysis of 173 patients undergoing bilateral sequential phacoemulsification.
Multivariable linear regression used to predict second-eye refraction based on first-eye data and IOL selection differences.

Main Results:

First-eye observed postoperative refraction independently predicted second-eye refraction (P < 0.001).
Observed first-eye refraction was weighted more heavily than predicted refraction.
The developed model reduced refractive prediction error (RMS error) by 11.3% compared to the SRK-T formula.

Conclusions:

First-eye postoperative refraction is a significant predictor of second-eye refractive outcomes.
First-eye predicted refraction has less predictive importance, potentially due to interocular symmetry.