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Validation of visual acuity on tablet application “Chudjane” used in clinical practice in normal eyes population

Validation of visual acuity on tablet application “Chudjane” used in clinical practice in normal eyes population

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
TCTR
Registry ID
TCTR20181210002
Enrollment
52
Registered
2018-12-10
Start date
2018-11-01
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Visual acuity Visual acuity application smartphone tablet Log MAR ETDRS

Interventions

Volunteers are tested visual acuity on 4 metro numeric ETDRS chart and "Chudjane" visual acuity application on tablet many times and the result will be compared.
Experimental No treatment
"Chudjane application"

Sponsors

Faculty of Medicine, Siriraj Hospital
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: -Heathy volunteers -Age at least 18 years old -No history ocular disease (Except refractive error that can corrected by glasses -Voluteer can read Arabic numeral

Exclusion criteria

Exclusion criteria: Volunteer is Visual acuity are worse than 6/60 Cannot co-operate with tester history of topical anesthetic drug or cyclopegic drug

Design outcomes

Primary

MeasureTime frame
Visual acuity equivalence one visit z-test for equivalence study—

Secondary

MeasureTime frame
Time one visit Paired t-test,Visual acuity reliability one visit intra-class correlation coefficient (ICC) and Pearson correlation coefficient (r)—

Countries

Thailand

Contacts

Public ContactNuttawut Rodanant

Department of ophthalmology, Siriraj hospital

rodanantretina@gmail.com+668-1806-2463

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026