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Validation of DDIVAT Digital Optotypes for Distance Visual Acuity Testing Among the Bulgarian Population

NCT07208838 · Status: ENROLLING_BY_INVITATION · Type: OBSERVATIONAL · Enrollment: 150

Last updated 2025-10-06

No results posted yet for this study

Summary

To compare distance visual acuity in Bulgarian patients over 18 years of age using two different methods - the Snellen method and the DIDIVAT digital online optotypes. For the purpose of this study, it is planned to examine native visual acuity (with and without prescribed optical correction), without additional mydriasis in both ways, of 150 Bulgarian patients (75 women and 75 men) over 18 years of age, hospitalized in a university eye clinic at St. George University Hospital and healthy volunteers willing to participate in the study. The statistical analysis that will be performed will aim to compare whether the two methods for determining distance visual acuity are identical in results, as well as to validate the application for the Bulgarian population.The study is expected to prove that the distance visual acuity of patients examined by both methods is identical.

Conditions

  • Vision Screening

Interventions

DIAGNOSTIC_TEST

To test visual acuity in 150 Bulgarian patients over 18 years of age using Snellens visual acuity chart and DDIVAT optotypes

The study compares newly developed visual acuity test (DDIVAT) with standart method for visual acuity testing used worldwide

Sponsors & Collaborators

  • Democritus University of Thrace

    collaborator OTHER

  • Plovdiv Medical University

    lead OTHER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-10-01
Primary Completion
2026-07-01
Completion
2026-07-01

Countries

  • Bulgaria

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07208838 on ClinicalTrials.gov