Accuracy of Mobile-Based Vision Charts.

NCT05251155 | Completed DMC

• 1 other identifier: RC-15-2-01
• Study Type: observational
• Target: 288
• Locations: 1 country
• Sites: 1

Brief Summary

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

Conditions

Visual Spatial Processing

Keywords

Visual acuity; Mobile-based chart; Snellen's chart

Outcome Measures

Primary Outcomes (1)

• 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.

Study Arms (2)

Standard vision chart.

Best corrected visual acuity measured by standard chart projector.

Diagnostic Test: Distant best corrected visual acuity assessment

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

Interventions

Distant best corrected visual acuity assessment DIAGNOSTIC_TEST

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.; Standard vision chart.

Eligibility Criteria

• Age: 4 Years - 70 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• 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.

You may qualify if:

• 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.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Benha University: lead

Study Sites (1)

Al-Nil Hospital

Banhā, QA, 13511, Egypt

Location

MeSH Terms

Conditions

Spatial Processing

Condition Hierarchy (Ancestors)

Spatial Behavior; Behavior

Study Officials

• Ahmed A Abdelshafy, MD

  Benha University

  STUDY CHAIR

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Lecturer of Ophthalmology

Study Record Dates

• First Submitted: February 10, 2022
• First Posted: February 22, 2022
• Study Start: February 1, 2020
• Primary Completion: April 11, 2021
• Study Completion: July 21, 2021
• Last Updated: March 29, 2022

Record last verified: 2022-03

Locations

EG (1)