# Vouchers to Increase Uptake of Already Free Eye Care

> **NCT04426331** · NA · COMPLETED · sponsor: **Johns Hopkins University** · enrollment: 739 (actual)

## Conditions studied

- Glaucoma
- Eye Diseases

## Interventions

- **BEHAVIORAL:** Voucher Without Value Information
- **BEHAVIORAL:** Voucher With Value Information

## Key facts

- **NCT ID:** NCT04426331
- **Lead sponsor:** Johns Hopkins University
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2017-05-05
- **Primary completion:** 2019-01-01
- **Final completion:** 2019-01-01
- **Target enrollment:** 739 (ACTUAL)
- **Last updated:** 2020-06-16

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04426331

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04426331, "Vouchers to Increase Uptake of Already Free Eye Care". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT04426331. Licensed CC0.

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