- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05090592
Influence of Corneal Biomechanical Properties on Myopia Control
Influence of Corneal Biomechanical Properties on Myopia Reduction and Axial Elongation in Children Using Orthokeratology and 0.01% Atropine
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
High myopia is accompanied by excessive growth of eyeball, which leads to many complications. Myopia control is a great concern of the government and ophthalmologists worldwide.
Atropine eye drops is used clinically to control the progression of myopia. In recent years, low dose Atropine eye drops (0.01%, 0.05% and 0.1%) have been proven to be effective in slowing growth of eyeball. With less negative effects, these eye drops have been widely used for school children in Taiwan. Orthokeratology is another effective tool to control myopia, and long-term wearing of Ortho-k lens can inhibit the speed of eyeball growth, it is the most useful optical treatment for myopia control.
The Corvis® ST is a combination of an air pulse tonometer with an ultra-high-speed Scheimpflug camera. The movement of the cornea is mainly influenced by three factors which can be measured by the instrument:
Intraocular pressure (IOP),biomechanical properties of the cornea and corneal thickness. The relationship between adult corneal biomechanics and refractive error has been noted in recent years. Previous studies pointed out that corneal biomechanics analyzer (Corvis ST) can measure the deformation process of the cornea and the biomechanics parameters. These literature found that the corneas of myopic patients, esp. high myopic, have larger corneal deformation in biomechanics analysis and revealed that the corneal stiffness of myopia patients was lower. There are still few discussions about the effect of orthokeratology on corneal biomechanics and there is no research focused on the change of corneal biomechanics of low-concentration atropine user which is worthy of our further exploration.
In this study, the investigators hope to analyze the changes in corneal biomechanics of myopic children with different treatment (low concentration atropine eye drops and orthokeratology) and explore the possible mechanism of myopia control.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Locations
-
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Ilan County
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Yilan, Ilan County, Taiwan, 265
- Yu-Teng Lai
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- myopia (<-1D)
- received Orthokeratology or 0.01% atropine for myopia control
- regular follow-up
Exclusion Criteria:
- ocular surface disease( dry eye, keratoconus..)
- allergy to orthokeratology or atropine
received eye surgery
- strabismus
- premature birth
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
myopic children
Myopic children use overnight orthokeratology or 0.01% atropine eye drop per night for myopia control
|
orthokeratology wearing for myopia control
0.01% atropine eye drop prevent myopic progression
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
changes of the intraocular pressure in myopic children with different treatment
Time Frame: from the date of starting treatment, the IOP was measured 1 week, 1month and every 3 months up to 24 months.
|
the investigators measure the intraocular pressure(IOP, mmHg) of myopic children with different treatment (low concentration atropine eye drops and orthokeratology)
|
from the date of starting treatment, the IOP was measured 1 week, 1month and every 3 months up to 24 months.
|
changes of the visual acuity in myopic children with different treatment
Time Frame: from the date of starting treatment, the visual acuity was measured 1 week, 1month and every 3 months up to 24 months.
|
the investigators measure the visual acuity of myopic children with different treatment (low concentration atropine eye drops and orthokeratology).
|
from the date of starting treatment, the visual acuity was measured 1 week, 1month and every 3 months up to 24 months.
|
changes of the central corneal thickness in myopic children with different treatment
Time Frame: from the date of starting treatment, the central corneal thickness was measured 1 week, 1month and every 3 months up to 24 months.
|
the the investigators measure the central corneal thickness(CCT, micrometer, ㎛) of myopic children with different treatment (low concentration atropine eye drops and orthokeratology) by Corvis ST machine
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from the date of starting treatment, the central corneal thickness was measured 1 week, 1month and every 3 months up to 24 months.
|
changes of the corneal biomechanics index in myopic children with different treatment
Time Frame: from the date of starting treatment, the corneal biomechanics index was measured 1 week, 1month and every 3 months up to 24 months.
|
the the investigators measure the corneal biomechanics index (CBI) of myopic children with different treatment (low concentration atropine eye drops and orthokeratology) by Corvis ST machine
|
from the date of starting treatment, the corneal biomechanics index was measured 1 week, 1month and every 3 months up to 24 months.
|
changes of the stress-strain index in myopic children with different treatment
Time Frame: from the date of starting treatment, the stress-strain index (SSI) was measured 1 week, 1month and every 3 months up to 24 months.
|
the the investigators measure the stress-strain index (SSI) of myopic children with different treatment (low concentration atropine eye drops and orthokeratology) by Corvis ST machine
|
from the date of starting treatment, the stress-strain index (SSI) was measured 1 week, 1month and every 3 months up to 24 months.
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
changes of axial length in myopic children with different treatment
Time Frame: from the date of starting treatment, the axial length was measured, then repeat measure were performed every 6 months up to 24 months
|
the investigators measure the axial length(mm) of eyeball of myopic children with different treatment (low concentration atropine eye drops and orthokeratology).
|
from the date of starting treatment, the axial length was measured, then repeat measure were performed every 6 months up to 24 months
|
Collaborators and Investigators
Investigators
- Study Director: Cheng-Jen Chiu, Doctor, Tzu Chi genral hospital
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ANTICIPATED)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Eye Diseases
- Refractive Errors
- Myopia
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Anti-Arrhythmia Agents
- Parasympatholytics
- Autonomic Agents
- Peripheral Nervous System Agents
- Muscarinic Antagonists
- Cholinergic Antagonists
- Cholinergic Agents
- Adjuvants, Anesthesia
- Bronchodilator Agents
- Anti-Asthmatic Agents
- Respiratory System Agents
- Mydriatics
- Atropine
Other Study ID Numbers
- Buddhist TCGH
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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