Skip to main content
OpenTrials
Completed

NCT Number: NCT04936100

Assessment of the Validity, Reliability, and Feasibility of Two Smartphone Applications for Testing the Visual Acuity

Visual acuity (VA) is the most common measure of visual function globally. In clinical settings and during screening events, VA is an important measure to quantify changes in vision over time. Additionally, in the context of epidemiological studies and population-based surveys, VA is a critical measure to determine the presence and degree of vision impairment and to report on the indicators of effective eye care service coverage (i.e. refractive error and cataract surgery), that are currently considered by World Health Organization (WHO) for monitoring progress towards the Universal Health Coverage.

There are numerous applications for assessing VA; however, the number of validated applications is limited. In this study, the investigators aim to evaluate the external validity, intra- and inter-observer reliability, and feasibility of two applications ("Easy Vision" and "Peek Acuity") for testing the visual acuity.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Vision Impairment Blindness Eye Diseases Nervous System Diseases Neurologic Manifestations Pathological Conditions, Signs and Symptoms Sensation Disorders Signs and Symptoms Vision Disorders

Age range

10 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences

Tehran, Iran

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age ≥10 years old

Exclusion criteria

  • Subjects who are not able to respond to the examiner

Treatment and study plan

Assessment of distance and near visual acuity using "Vision Screening module" of "Easy Vision" application

Device

The presenting visual acuity will be assessed using the Vision Screening module of the "Easy Vision" application.

Assessment of distance and near visual acuity using "Test Yourself module" of "Easy Vision" application

Device

The presenting visual acuity will be assessed using the Test Yourself module of the "Easy Vision" application.

Assessment of distance and near visual acuity using "Peek Acuity" application

Device

The presenting visual acuity will be assessed using the "Peek Acuity" application.

Assessment of distance and near visual acuity using the conventional methods

Other

The presenting visual acuity will be assessed using the conventional methods ["Chart: Tumbling E optotype" for assessing distance visual acuity and "Handheld chart: Tumbling E Near Point Vision Chart" for assessing near visual acuity]

Primary outcomes

  1. Distance visual acuity assessment with Easy Vision versus Peek Acuity versus conventional distance visual acuity chart

    Time frame: Through study completion [an average of 6 months]

    To assess the agreement between two smartphone-based evaluation of distance visual acuity (LogMAR unit) with Easy Vision and Peek Acuity and a conventional distance visual acuity chart (Tumbling E optotype)

  2. Near visual acuity assessment with Easy Vision versus Peek Acuity versus conventional near visual acuity chart

    Time frame: Through study completion [an average of 6 months]

    To assess the agreement between two smartphone-based evaluation of near visual acuity (LogMAR unit) with Easy Vision and Peek Acuity and a conventional near visual acuity chart (Handheld chart: Tumbling E Near Point Vision Chart)

Sponsors and collaborators

Lead sponsor

Shahid Beheshti University of Medical Sciences

Other

Registry information

Important dates

Study start
2021
Primary completion
2021
Study completion
2022
First posted
Jun 23, 2021
Registry last updated
Jul 27, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.