# Neurosensory Abnormalities in SymptomAtic Ocular Surface Patients (NASA)

> **NCT04838223** · — · SUSPENDED · sponsor: **Tufts Medical Center** · enrollment: 1000 (estimated)

## Conditions studied

- Dry Eye
- Neuropathic Pain

## Interventions

- **OTHER:** Hyperosmolar Response
- **OTHER:** Proparacaine Challenge Test
- **OTHER:** Contact Lens Dry Eye Questionnaire-8 (CLDEQ-8) Optional; only for Contact Lens Wearers
- **OTHER:** Ocular Pain Assessment Survey (OPAS)
- **OTHER:** Visual Analogue Questionnaire

## Key facts

- **NCT ID:** NCT04838223
- **Lead sponsor:** Tufts Medical Center
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** SUSPENDED
- **Start date:** 2021-07-02
- **Primary completion:** 2025-12-31
- **Final completion:** 2026-07
- **Target enrollment:** 1000 (ESTIMATED)
- **Why stopped:** PI is leaving insitution. This study is no longer active at TMC.
- **Last updated:** 2026-01-27

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04838223

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04838223, "Neurosensory Abnormalities in SymptomAtic Ocular Surface Patients (NASA)". Retrieved via AI Analytics 2026-07-13 from https://api.ai-analytics.org/clinical/NCT04838223. Licensed CC0.

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