Accuracy of Mobile-Based Vision Charts.

Accuracy of Mobile-Based Vision Charts in Clinical Practice.

Analyzing the accuracy of mobile-based distant vision charts in clinical practice as an economic alternative for standard vision charts.

Study Overview

• Status: Completed
• Conditions: Visual Spatial Processing
• Intervention / Treatment: Diagnostic test: Distant best corrected visual acuity assessment

Detailed Description

Accuracy of mobile-based visual acuity testing in clinical practice is still debatable. The aim of this study was to analyze the accuracy of mobile-based distant vision chart in comparison to standard chart projector.

• Study Type: Observational
• Enrollment (Actual): 288

Contacts and Locations

Study Locations

• Egypt
  • QA
    • Banhā, QA, Egypt, 13511
      • Al-Nil Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 4 years to 70 years (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Subjects aimed to asses their best corrected visual acuity or seek spectacles prescription at ophthalmology clinic at Al-Nil Hospital, Banha, EGYPT.

Description

Inclusion Criteria:

• Subjects visited ophthalmology clinic at Al-Nil Hospital, Banha, EGYPT for visual acuity assessment.
• Subjects that their best corrected visual acuity was ranged from 0.1 to 1.0 in decimal form measured on snellen's chart.

Exclusion Criteria:

• Subjects that refuse to measure visual acuity twice during the same visit.
• Subjects that their best corrected visual acuity is less than 0.1 in decimal form by the standard chart projector.

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Standard vision chart.; Best corrected visual acuity measured by standard chart projector.	Diagnostic test: Distant best corrected visual acuity assessment; Measuring distant visual acuity on snellen's chart using two methods and results were converted to equivalent logarithm of minimum angle of resolution to compare accuracy of mobile based chart to the standard vision chart.
Mobile based vision chart.; Best corrected visual acuity measured by mobile based chart with screen mirroring over 24 inch monitor.	Diagnostic test: Distant best corrected visual acuity assessment; Measuring distant visual acuity on snellen's chart using two methods and results were converted to equivalent logarithm of minimum angle of resolution to compare accuracy of mobile based chart to the standard vision chart.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Accuracy of mobile based "snellen chart" in measuring distant visual acuity.	To compare the decimal results of mobile based snellen chart for measuring distant vision with the decimal results of the standard snellen chart projector.	Immediately after visual acuity testing using the standard chart projector.

Collaborators and Investigators

• Sponsor: Benha University
• Investigators: Study Chair: Ahmed A Abdelshafy, MD, Benha University

Study record dates

Study Major Dates

• Study Start (Actual): February 1, 2020
• Primary Completion (Actual): April 11, 2021
• Study Completion (Actual): July 21, 2021

Study Registration Dates

• First Submitted: February 10, 2022
• First Submitted That Met QC Criteria: February 18, 2022
• First Posted (Actual): February 22, 2022

Study Record Updates

• Last Update Posted (Actual): March 29, 2022
• Last Update Submitted That Met QC Criteria: March 13, 2022
• Last Verified: March 1, 2022

More Information

Terms related to this study

• Keywords: Visual acuity; Mobile-based chart; Snellen's chart
• Other Study ID Numbers: RC-15-2-01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No