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

Identification of strategies to optimize pain management in people with dementia living in nursing homes using nominal group technique.

Geriatric nursing (New York, N.Y.)·2026

Same author

Evidence of orbital mixing upon ionization via Cooper minimum photoelectron dynamics in epichlorohydrin. Experiment and theory.

The Journal of chemical physics·2026

Same author

Cardiovascular magnetic resonance 4D flow derived aortic and pulmonary wall shear stress in pediatric patients with repaired tetralogy of Fallot.

Frontiers in pediatrics·2025

Same author

Data of the Insect Biome Atlas: a metabarcoding survey of the terrestrial arthropods of Sweden and Madagascar.

Scientific data·2025

Same author

Widespread slow growth of acquisitive tree species.

Nature·2025

Same author

Effects of adding early cooperation and a work-place dialogue meeting to primary care management for sick-listed patients with stress-related disorders: CO-WORK-CARE-Stress - a pragmatic cluster randomised controlled trial.

Scandinavian journal of primary health care·2024

Search research articles

Related Experiment Video

Updated: Jun 8, 2026

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

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

Published on: June 6, 2017

Letter imaging by diffractive, bifocal intraocular lenses: a computer study.

C Dahnér, M Larsson, A Nyström

|September 24, 2010

Summary

This summary is machine-generated.

Computer simulations show that diffractive, bifocal intraocular lens imaging quality depends on letter size relative to background. Image quality remains good unless letter sizes are comparable to the unfocused background, causing degradation.

More Related Videos

Measuring the Behavioral Effects of Intraocular Scatter

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

Microfabrication of Implantable Optics Integrated in a Microstructured Imaging Window for Advanced In Vivo Imaging

Microfabrication of Implantable Optics Integrated in a Microstructured Imaging Window for Advanced In Vivo Imaging

Published on: April 11, 2025

Related Experiment Videos

Last Updated: Jun 8, 2026

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

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

Published on: June 6, 2017

Measuring the Behavioral Effects of Intraocular Scatter

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

Microfabrication of Implantable Optics Integrated in a Microstructured Imaging Window for Advanced In Vivo Imaging

Microfabrication of Implantable Optics Integrated in a Microstructured Imaging Window for Advanced In Vivo Imaging

Published on: April 11, 2025

Area of Science:

Ophthalmic optics
Optical engineering
Computational imaging

Background:

Diffractive, bifocal intraocular lenses (IOLs) are used to correct vision.
Understanding image quality in IOLs is crucial for visual performance.
Previous studies have explored various factors affecting IOL image quality.

Purpose of the Study:

To investigate the impact of letter size, pupil diameter, and pupil displacement on the computer-simulated image quality of ideal-model diffractive, bifocal intraocular lenses.
To determine the conditions under which image degradation occurs in such IOLs.

Main Methods:

Computer simulations were performed on ideal-model diffractive, bifocal intraocular lenses.
The study analyzed the influence of varying letter sizes, pupil diameters, and pupil displacements on the resulting images.
Image quality metrics were assessed based on the simulated visual output.

Main Results:

Simulated image quality was found to be generally good.
Image degradation was observed when letter sizes were of the same order of magnitude as the unfocused background.
Pupil diameter and displacement also influenced image quality, though the primary factor identified was the relative sizing of letters to background.

Conclusions:

The relative size of the target letter to the unfocused background is a critical factor in the image quality of diffractive, bifocal IOLs.
Careful consideration of letter size in relation to optical parameters is necessary to optimize visual outcomes with these lenses.