NCT07208838

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

• Status: Enrolling By Invitation
• Phase: —
• Study type: Observational
• Enrollment: 150 (estimated)
• Sponsor: Plovdiv Medical University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

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

Type	Name	Description
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

Timeline

• Start date: 2025-10-01
• Primary completion: 2026-07-01
• Completion: 2026-07-01
• First posted: 2025-10-06
• Last updated: 2025-10-06

Locations

1 site across 1 country: Bulgaria