Actively Recruiting
Application of Phototherapeutic Keratectomy Mode to Mark the Axis of Astigmatism
Led by Tianjin Eye Hospital · Updated on 2024-11-19
100
Participants Needed
1
Research Sites
N/A
Total Duration
On this page
AI-Summary
What this Trial Is About
This research aims to improve correction of astigmatism during corneal refractive surgery by using phototherapeutic keratectomy (PTK) mode to precisely mark the axis of astigmatism. Astigmatism correction is challenging because it involves both magnitude and direction, and errors can occur due to head or eye rotation. The study explores using excimer laser therapeutic keratectomy to set laser parameters for accurate axis marking, aided by static cyclotorsion of the eye. Participants will be divided into two groups: one receiving the PTK mode marking procedure (experimental group) and one with no intervention (limbus group). The PTK mode aims to precisely mark the astigmatism axis using laser treatment. The study is non-randomized and open-label, with no masking. No additional treatments or procedures beyond the marking are described. During the study, researchers will measure participants' eye refraction three months after the procedure to assess the accuracy of astigmatism correction. Participants must be at least 18 years old and free of ocular diseases. The trial also allows healthy volunteers. The total duration and follow-up details focus mainly on the primary outcome at three months post-treatment.
CONDITIONS
Brief Title
Application of Phototherapeutic Keratectomy Mode to Mark the Axis of Astigmatism
Who Can Participate
Eligibility Criteria
You may qualify if you...
- At least 18 years old
You will not qualify if you...
- Presence of any ocular disease or eye condition
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Single procedure with follow-up to 3 months
Participants receive axis marking using the phototherapeutic keratectomy mode or no intervention depending on group assignment.
1 treatment visit and follow-up visits over 3 months
Trial Site Locations
Total: 1 location
1
Tianjin Eye Hospital
Tianjin, Tianjin Municipality, China, 300020
Actively Recruiting
Research Team
W
Wang
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NON_RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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