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

You might also read

Related Articles

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

Sort by

Same author

Feasibility of lung imaging at 0.55T for assessment of interstitial lung disease in patients with pulmonary sarcoidosis.

European radiology·2026

Same author

AI-Based Opportunistic CT Risk Assessment Using TotalSegmentator in Osteoporotic Vertebral Fractures.

Journal of imaging informatics in medicine·2026

Same author

Assessing Visual Function in Retinal Gene Therapy.

Methods in molecular biology (Clifton, N.J.)·2026

Same author

AI-Based Myocardial Segmentation and Attenuation Mapping Improved Detection of Myocardial Ischemia and Infarction on Emergency CT Angiography.

Bioengineering (Basel, Switzerland)·2026

Same author

Impact of CT dose on AI performance: A comparison of radiomics, deep, and foundation models in a multicentric anthropomorphic phantom study.

Medical physics·2026

Same author

Impact of pulsed stimulation on objective and subjective visual acuity measurements in nystagmus.

Documenta ophthalmologica. Advances in ophthalmology·2025

Same journal

To appear in a new light: Varying illumination colors induce dynamic transformations of perceptual qualities in still images.

i-Perception·2026

Same journal

Pseudo-slimy: A novel phenomenon to evoke stickiness perception.

i-Perception·2026

Same journal

Predictive visual uncertainty around moving trajectories influences causality judgments in launching displays.

i-Perception·2026

Same journal

Light and shape in the work of Robert Fones.

i-Perception·2026

Same journal

Sensorimotor numerosity uniquely supports arithmetic development in children.

i-Perception·2026

Same journal

In praise of anaglyphs.

i-Perception·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 10, 2026

How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index

How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index

Published on: January 2, 2012

Blur Unblurred-A Mini Tutorial.

Hans Strasburger¹, Michael Bach², Sven P Heinrich²

¹Institute of Medical Psychology, Ludwig-Maximilians-Universität, München, Germany; Department of Medical Psychology and Medical Sociology, Georg-August University, Göttingen, Germany.

|May 18, 2018

Summary

This summary is machine-generated.

Optical blur from defocus is not a simple low-pass filter. Dioptric blur, caused by refractive errors, is better modeled as a cylinder, impacting visual acuity.

Keywords:

accommodation acuity blur diopters optics optometry spurious resolution

More Related Videos

Brain Organoid Generation from Induced Pluripotent Stem Cells in Home-Made Mini Bioreactors

Brain Organoid Generation from Induced Pluripotent Stem Cells in Home-Made Mini Bioreactors

Published on: December 11, 2021

Generating Spheroids from Various Chondrocytes using Low-Adhesive Conditions under Gravity and Homemade Mini-Bioreactors

Generating Spheroids from Various Chondrocytes using Low-Adhesive Conditions under Gravity and Homemade Mini-Bioreactors

Published on: January 31, 2025

Related Experiment Videos

Last Updated: Feb 10, 2026

How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index

How to Measure Cortical Folding from MR Images: a Step-by-Step Tutorial to Compute Local Gyrification Index

Published on: January 2, 2012

Brain Organoid Generation from Induced Pluripotent Stem Cells in Home-Made Mini Bioreactors

Brain Organoid Generation from Induced Pluripotent Stem Cells in Home-Made Mini Bioreactors

Published on: December 11, 2021

Generating Spheroids from Various Chondrocytes using Low-Adhesive Conditions under Gravity and Homemade Mini-Bioreactors

Generating Spheroids from Various Chondrocytes using Low-Adhesive Conditions under Gravity and Homemade Mini-Bioreactors

Published on: January 31, 2025

Area of Science:

Optometry
Vision Science
Optical Physics

Background:

Optical blur from defocus is often inaccurately equated to low-pass filtering.
Understanding the precise nature of optical blur is crucial for accurate vision correction and analysis.

Purpose of the Study:

To differentiate dioptric blur from low-pass filtering.
To model dioptric blur using a cylindrical point-spread function.
To establish relationships between blur diameter, dioptric error, and visual acuity.

Main Methods:

Derivation of the blur kernel for dioptric blur, approximating it as a cylinder.
Utilizing a light-ray model to determine the blur circle diameter.
Relating blur diameter to refractive error in diopters, near/far points, and visual acuity.

Main Results:

Dioptric blur, disregarding diffraction, is accurately represented by a cylindrical blur kernel.
The diameter of the retinal blur circle is directly calculable from optical parameters.
Established quantitative relationships between blur diameter, dioptric error, and visual acuity.

Conclusions:

Dioptric blur and Gaussian low-pass filtering are distinct optical phenomena.
The cylindrical model provides a more accurate representation of dioptric blur.
The derived relationships aid in understanding and quantifying visual performance deficits due to refractive errors.