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

Shahid Beheshti University of Medical Sciences

Status: Completed

Conditions: Vision Impairment; Blindness

Treatments: Device: Assessment of distance and near visual acuity using "Vision Screening module" of "Easy Vision" application; Other: Assessment of distance and near visual acuity using the conventional methods; Device: Assessment of distance and near visual acuity using "Peek Acuity" application; Device: Assessment of distance and near visual acuity using "Test Yourself module" of "Easy Vision" application

Study type: Interventional

Funder types: Other

Identifiers

NCT04936100

99424

Details and patient eligibility

About

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.

Enrollment: 120 patients

Sex: All

Ages: 10+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Age ≥10 years old

Exclusion criteria

• Subjects who are not able to respond to the examiner

Trial design

Primary purpose: Health Services Research

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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120 participants in 4 patient groups

Visual acuity assessment using "Vision Screening module" of "Easy Vision" application

Experimental group

Treatment:

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

Visual acuity assessment using "Test Yourself module" of "Easy Vision" application

Experimental group

Treatment:

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

Visual acuity assessment using "Peek Acuity" application

Experimental group

Treatment:

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

Visual acuity assessment using the conventional methods

Other group

Treatment:

Other: Assessment of distance and near visual acuity using the conventional methods