# Retinal Nerve Fiber Layer Thickness Changes in Parkinson Disease: A Meta-analysis

> **NCT01928212** · — · COMPLETED · sponsor: **Yifan Feng** · enrollment: 500 (actual)

## Conditions studied

- Parkinson Disease

## Interventions

- **DEVICE:** Optical coherence tomography

## Key facts

- **NCT ID:** NCT01928212
- **Lead sponsor:** Yifan Feng
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2013-08
- **Primary completion:** 2014-01
- **Final completion:** 2014-05
- **Target enrollment:** 500 (ACTUAL)
- **Last updated:** 2014-07-18

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01928212

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01928212, "Retinal Nerve Fiber Layer Thickness Changes in Parkinson Disease: A Meta-analysis". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT01928212. Licensed CC0.

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