Unknown OBSERVATIONAL NCT03406390

The Effects of Primary Pterygium on Contrast Sensitivity Preoperatively and Postoperatively

Sponsor: Zhongshan Ophthalmic Center, Sun Yat-sen University

Updated 8 times since 2018 Last updated: Jan 13, 2018 Started: Nov 1, 2017 Primary completion: Nov 1, 2018 Completion: Dec 31, 2018

This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

A observational or N/A phase clinical study on Primary Pterygium, this trial is ongoing. The trial is conducted by Zhongshan Ophthalmic Center, Sun Yat-sen University and has accumulated 8 data snapshots since 2017. Longitudinal tracking of this trial contributes to a broader understanding of treatment development timelines.

Status Flow

Change History

8 versions recorded

Sep 2024 — Present [monthly]

Unknown
Jul 2024 — Sep 2024 [monthly]

Unknown

Status: Unknown Status → Unknown
Jan 2021 — Jul 2024 [monthly]

Unknown Status
Feb 2020 — Jan 2021 [monthly]

Unknown Status

Status: Recruiting → Unknown Status
Jun 2018 — Feb 2020 [monthly]

Recruiting

▶ Show 3 earlier versions

May 2018 — Jun 2018 [monthly]

Recruiting
Apr 2018 — May 2018 [monthly]

Recruiting

Phase: NA → None
Feb 2018 — Apr 2018 [monthly]

Recruiting NA

First recorded

Nov 2017

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:

Zhongshan Ophthalmic Center, Sun Yat-sen University

Data source: Zhongshan Ophthalmic Center, Sun Yat-sen University

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations

• Guangzhou, China