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

Not Applicable

Completed

• Conditions: Blindness; Vision Impairment

• Registration Number: NCT04936100
• Lead Sponsor: Shahid Beheshti University of Medical Sciences

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Status Verified: 2021-04
• Study First Submitted: 2021-04-25
• Study First Submitted QC: 2021-06-13
• Study Start: 2021-06-23
• Study First Posted: 2021-06-23
• Primary Completion: 2021-12-23
• Study Completion: 2022-01-30
• Last Update Submitted: 2022-07-24
• Last Update Posted: 2022-07-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 120

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Primary Outcome Measures

Name	Time	Method
Distance visual acuity assessment with Easy Vision versus Peek Acuity versus conventional distance visual acuity chart	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)
Near visual acuity assessment with Easy Vision versus Peek Acuity versus conventional near visual acuity chart	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)

Trial Locations

Locations (1)

Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences; 🇮🇷 Tehran, Iran, Islamic Republic of