Comparison of Cross-cylinder and Conventional Photorefractive Keratectomy(PRK) in Correcting Medium-high Astigmatism
Comparison of Cross-cylinder and Conventional PRK for Laser Correction of Astigmatism: A Randomized Clinical Trial.
Sponsor: Tabriz University
Listed as NCT00663923, this PHASE3 trial focuses on Astigmatism and remains completed. Sponsored by Tabriz University, it has been updated 6 times since 2007, reflecting limited change activity. This study adds to the evidence base for this therapeutic area through structured, versioned documentation.
Status Flow
Change History
6 versions recorded-
Sep 2025 — Present [monthly]
Completed PHASE3
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Sep 2024 — Sep 2025 [monthly]
Completed PHASE3
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Jul 2024 — Sep 2024 [monthly]
Completed PHASE3
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Jan 2021 — Jul 2024 [monthly]
Completed PHASE3
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Jun 2018 — Jan 2021 [monthly]
Completed PHASE3
▶ Show 1 earlier version
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Jan 2017 — Jun 2018 [monthly]
Completed PHASE3
First recorded
Nov 2007
Trial started
Per CT.gov start date — pre-dates our first snapshot
Eligibility Summary
No eligibility information available.
Contact Information
- Tabriz University
For direct contact, visit the study record on ClinicalTrials.gov .