# Comparison of Four Methods for Entering the Gap Position of Landolt Cs

> **NCT04299659** · — · COMPLETED · sponsor: **Aalen University** · enrollment: 24 (actual)

## Conditions studied

- Quality Control
- Validation Study

## Interventions

- **DIAGNOSTIC_TEST:** Landolt C entry method

## Key facts

- **NCT ID:** NCT04299659
- **Lead sponsor:** Aalen University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2022-07-22
- **Primary completion:** 2023-03-01
- **Final completion:** 2023-06-30
- **Target enrollment:** 24 (ACTUAL)
- **Last updated:** 2023-07-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04299659

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04299659, "Comparison of Four Methods for Entering the Gap Position of Landolt Cs". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04299659. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*