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 Experiment Video

Updated: Jan 6, 2026

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

1.6K

Development and Validation of a Smartphone-based Contrast Sensitivity Test.

Esmael Habtamu1, Andrew Bastawrous1,2, Nigel M Bolster2

  • 1International Centre for Eye Health, London School of Hygiene & Tropical Medicine, London, UK.

Translational Vision Science & Technology
|October 4, 2019
PubMed
Summary

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

Training Data Recorders with a Manual to Take High-Quality Trachoma Photographs in South Sudan.

The American journal of tropical medicine and hygiene·2026
Same author

Mainstreaming neglected tropical disease interventions into primary health care: accelerating elimination and sustaining gains.

The Lancet. Primary care·2026
Same author

The role of group III/IV afferent feedback in the ventilatory, pressor and metabolic responses to exercise in normoxia and hypoxia.

The Journal of physiology·2026
Same author

Head-to-Head Comparative Evaluation of Four Commercially Available Artificial Intelligence Systems for Detecting Referable Diabetic Retinopathy in a Tanzanian Population.

Diabetes care·2026
Same author

Quality-of-Life and Utility Values Associated With Diabetic Retinopathy in Tanzania.

Value in health regional issues·2026
Same author

Migration and its impact on universal HIV testing and treatment in the HPTN 071 (PopART) study communities.

PLOS global public health·2026

A new smartphone-based contrast sensitivity (CS) test, PeekCS, is repeatable, rapid, and comparable to the Pelli-Robson CS test. This accessible tool enhances visual function assessment, especially in community settings.

Area of Science:

  • Ophthalmology
  • Visual Science
  • Medical Technology

Background:

  • Contrast sensitivity (CS) is crucial for visual function and detecting subtle vision loss.
  • Current CS testing methods are underutilized due to accessibility challenges.

Purpose of the Study:

  • To develop and validate a smartphone-based CS test to improve accessibility.
  • To assess the performance of the new test against a standard reference.

Main Methods:

  • A novel smartphone-based tumbling-E CS test, Peek Contrast Sensitivity (PeekCS), was developed and field-tested.
  • Validation involved comparison with the Pelli-Robson CS test (PRCS) in community clinics in Ethiopia.
  • Test-retest variability and correlation were assessed using statistical methods, including Bland-Altman plots.
Keywords:
contrast sensitivitysmartphonetrachoma

More Related Videos

Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection
06:00

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

Published on: January 26, 2024

1.9K
Smartphone Fundus Photography
05:51

Smartphone Fundus Photography

Published on: July 6, 2017

40.0K

Related Experiment Videos

Last Updated: Jan 6, 2026

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

1.6K
Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection
06:00

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

Published on: January 26, 2024

1.9K
Smartphone Fundus Photography
05:51

Smartphone Fundus Photography

Published on: July 6, 2017

40.0K

Main Results:

  • PeekCS demonstrated strong repeatability (correlation coefficient: 0.93), comparable to PRCS (0.96).
  • High correlation between PeekCS and PRCS (0.94) was observed, with narrow limits of agreement.
  • PeekCS offered a significantly faster testing time (44.6s) compared to PRCS (48.6s).

Conclusions:

  • The smartphone-based PeekCS is a repeatable, rapid, and highly comparable alternative for CS testing.
  • PeekCS offers an accessible and user-friendly option for visual function assessment, particularly in community-based settings.