# Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study

> **NCT03191942** · NA · COMPLETED · sponsor: **The Hong Kong Polytechnic University** · enrollment: 70 (actual)

## Conditions studied

- Myopia

## Interventions

- **DEVICE:** Modified ortho-k lenses
- **DEVICE:** Ortho-k lenses

## Key facts

- **NCT ID:** NCT03191942
- **Lead sponsor:** The Hong Kong Polytechnic University
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2017-06-20
- **Primary completion:** 2021-03-21
- **Final completion:** 2021-07-27
- **Target enrollment:** 70 (ACTUAL)
- **Last updated:** 2022-07-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03191942

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03191942, "Variation of Orthokeratology Lens Treatment Zone (VOLTZ) Study". Retrieved via AI Analytics 2026-05-31 from https://api.ai-analytics.org/clinical/NCT03191942. Licensed CC0.

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