Actively Recruiting
Accuracy of Corneal Astigmatism Measurement in Different Regional Modes
Led by Wenzhou Medical University · Updated on 2024-07-23
70
Participants Needed
1
Research Sites
20 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are studying the accuracy of measuring total corneal astigmatism compared to the actual corneal astigmatism under different regional measurement settings. This observational study focuses on patients who have undergone phacoemulsification surgery, with or without the implantation of toric intraocular lenses (IOLs), and have a certain degree of corneal astigmatism. The goal is to find the best region setting for measuring corneal astigmatism accurately. Participants with corneal astigmatism will have various eye measurements taken using specialized devices. These include total corneal astigmatism and anterior chamber depth measured by a Scheimpflug tomographer, pupil size assessed by the itrace and MONCV3 devices, and residual astigmatism evaluated through subjective refraction. The study observes these measurements at least one month after their cataract surgery. During the study, participants will undergo eye exams and tests to collect the necessary data. Researchers will analyze differences in vectorial measurements, pupil sizes, residual astigmatism, and anterior chamber depth to determine measurement accuracy. The study monitors these outcomes to optimize corneal astigmatism measurement methods. Participation duration varies depending on individual schedules and follow-up visits.
CONDITIONS
Brief Title
Accuracy of Corneal Astigmatism in Different Region Modes
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age 18 years or older
- Patients who have had phacoemulsification surgery with or without toric intraocular lens implantation
- Presence of a certain amount of corneal astigmatism
- Best corrected visual acuity of 20/30 (0.66) or better
You will not qualify if you...
- Corneal diseases or severe irregular astigmatism such as pterygium or keratoconus
- Presence of corneal clouding
- Eye diseases that may affect vision such as glaucoma, uveitis, retinal disease, or pathologic myopia
- History of eye surgery or trauma before the cataract surgery
- Intraocular lens decentration greater than 0.3 mm or tilt greater than 5 degrees
- Implantation of multifocal intraocular lens
- Use of rigid contact lenses within the past 4 weeks or soft contact lenses within the past 1 week
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 - 1 day
Participants undergo measurements of corneal astigmatism, anterior chamber depth, pupil size, and residual astigmatism using various eye devices.
1 visit (in-person)
Duration - At least 1 month
Participants are observed for corneal and vision outcomes at least 1 month after surgery.
Follow-up visit(s) at or after 1 month post-surgery
Trial Site Locations
Total: 1 location
1
Eye Hispital of Wenzhou Medical University
Wenzhou, Zhejiang, China, 325000
Actively Recruiting
Research Team
A
AYong Yu, MD.PhD.
X
Xu Shao, MD
How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
1
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