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

Sensitivity, Specificity, and Predicted Value

Sensitivity, Specificity, and Predicted Value

In healthcare diagnostics, laboratory tests play a crucial role in identifying and diagnosing a wide range of medical conditions. However, interpreting test results is not always straightforward. An abnormal test result does not always confirm the presence of a disease, just as a normal result does not guarantee its absence. To assess the reliability of these diagnostic tools, healthcare practitioners rely on two key statistical indicators: sensitivity and specificity.
Sensitivity is the...

You might also read

Related Articles

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

Sort by

Same author

The answer is 23 years - what is the question? Understanding the time lag between ophthalmic research and clinical adoption.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2026

Same author

Effect of a head strap on the function of an eyelid warming compress.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2026

Same author

Diagnostic utility of inflammation-associated clinical signs in detecting MMP-9 expression in dry eye disease: A cross-sectional conjunctival impression cytology and droplet digital PCR study.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2026

Same author

Optimising slit-lamp biomicroscope fluorescein imaging filters.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2026

Same author

Reimagining dry eye disease management - a multimodal approach targeting the key pathophysiological drivers.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2026

Same author

Corrigendum to "TFOS DEWS III: Digest" Am J Ophthalmol. 2025; 279:451-553.

American journal of ophthalmology·2026

Search research articles

Related Experiment Video

Updated: Mar 19, 2026

$Subjective Refraction Test Using a Smartphone for Vision Screening$

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

Mobile app Aston contrast sensitivity test.

Alec Kingsnorth¹, Tom Drew¹, Bikramjit Grewal¹

¹Ophthalmic Research Group, Life and Health Sciences, Aston University, Birmingham, UK.

Clinical & Experimental Optometry

|June 14, 2016

Summary

This summary is machine-generated.

The Aston contrast sensitivity mobile apps offer a valid and repeatable method for assessing vision across multiple spatial frequencies. These apps are more time-efficient than traditional charts, improving visual function assessment.

Keywords:

CSV-1000 Pelli-Robson chart contrast sensitivity mobile app repeatability validity

More Related Videos

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Published on: March 24, 2020

Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection

Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection

Published on: January 26, 2024

Related Experiment Videos

Last Updated: Mar 19, 2026

$Subjective Refraction Test Using a Smartphone for Vision Screening$

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Using an Automated Hirschberg Test App to Evaluate Ocular Alignment

Published on: March 24, 2020

Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection

Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection

Published on: January 26, 2024

Area of Science:

Ophthalmology and Visual Science
Medical Technology
Digital Health

Background:

Clinical contrast sensitivity testing is limited in spatial frequencies and contrast levels.
Accurate visual function assessment requires comprehensive contrast sensitivity evaluation.
Traditional methods often fail to capture the full spectrum of visual performance.

Purpose of the Study:

To validate the accuracy and repeatability of the swept-frequency Aston contrast sensitivity mobile applications (near and distance).
To compare the performance of the mobile apps against traditional clinical charts (CSV-1000 and Pelli-Robson).
To assess the impact of visual degradation on contrast sensitivity measurements using both app and chart-based methods.

Main Methods:

Twenty subjects with full refractive correction underwent contrast sensitivity testing.
Testing included the Aston near app, distance app, CSV-1000, and Pelli-Robson charts.
Vision was degraded using Bangerter foils (0.8 and 0.2), with repeated measures for the 0.8 foil.

Main Results:

The Aston mobile apps demonstrated higher contrast sensitivity compared to printed tests.
All tested methods showed reduced contrast sensitivity with visual degradation and increased spatial frequency.
The mobile apps were more repeatable and faster than the CSV-1000, despite Pelli-Robson having the lowest repeatability coefficient.

Conclusions:

The Aston near and distance mobile applications provide a valid, repeatable, and time-efficient approach to contrast sensitivity assessment.
These apps effectively measure contrast sensitivity across multiple spatial frequencies, overcoming limitations of traditional charts.
The mobile apps represent a significant advancement in visual function testing technology.