Biometric Factors Changes Caused by Myopia Orthokeratology (OK) Lens
- Conditions
- Contact Lenses
- Interventions
- Device: Overnight orthokeratology
- Registration Number
- NCT05433259
- Lead Sponsor
- Wenzhou Medical University
- Brief Summary
Subjects fit with VST or CRT type lens are reviewed 1 day to 2 year after first wearing the lens. Ocular examinations were performed, including slit-lamp biomicroscope, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), corneal topography (Medmont E300W, Medmont Pty Ltd, Melbourne, Australia), corneal refractive power (autorefractometer, KR880, Topcon, JAPAN), corneal epithelial thickness (Optical Coherence Tomography, RTVue-XR), axial length using IOL-Master 700 (Carl Zeiss Meditec AG). To investigate corneal and retina changes caused by overnight OK lens.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 60
- Normal subjects without any history of ocular surgeries or diseases (except for refractive errors) or systemic diseases that might affect contact lens wearing. The spherical error between -1.0 and -5.0 D, cylindrical error of at most 2.0 D, and a corrected distance visual acuity of 20/20 or better.
- Subjects who had previously worn contact lens, were also excluded
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description CRT type lens Overnight orthokeratology Subjects fitted with CRT type lenses VST type lens Overnight orthokeratology Subjects fitted with VST type lenses
- Primary Outcome Measures
Name Time Method change of Corneal Epithelium up to 1 day, 1 week,1 month All epithelial thickness and treatment zone area record by baseline and follow up examination.
- Secondary Outcome Measures
Name Time Method Axial length up to 2 years Axial length growth after lens wear
Trial Locations
- Locations (1)
Eye Hospital of Wenzhou Medical College
🇨🇳Wenzhou, Zhejiang, China