Biometric Factors Changes Caused by Myopia Orthokeratology (OK) Lens

Wenzhou Medical University

Status: Active, not recruiting

Conditions: Contact Lenses

Treatments: Device: Overnight orthokeratology

Study type: Interventional

Funder types: Other

Identifiers

NCT05433259

OK lens-Angio OCT

Details and patient eligibility

About

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.

Enrollment: 60 estimated patients

Sex: All

Ages: 8+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 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.

Exclusion criteria

• Subjects who had previously worn contact lens, were also excluded

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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60 participants in 2 patient groups

CRT type lens

Experimental group

Description:

Subjects fitted with CRT type lenses

Treatment:

Device: Overnight orthokeratology

VST type lens

Experimental group

Description:

Subjects fitted with VST type lenses

Treatment:

Device: Overnight orthokeratology