- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00094744
Trial Comparing Part-time Versus Full-time Patching for Severe Amblyopia
A Randomized Trial Comparing Part-time Versus Full-time Patching for Severe Amblyopia
The goals of this study are:
- To determine whether the visual acuity improvement obtained with part-time (6 hours) patching is equivalent to the visual acuity improvement obtained with full-time patching (all or all but one waking hour) for severe amblyopia.
- To develop more precise estimates than currently available for the visual acuity improvement that occurs during treatment of amblyopia with patching.
- To identify factors that may be associated with successful treatment of amblyopia with patching.
Study Overview
Detailed Description
Amblyopia is the most common cause of monocular visual impairment in both children and young and middle-aged adults. Patching has been the mainstay of amblyopia therapy. It is generally held that the response to treatment is best when it is instituted at an early age, particularly by age two or three, and is poor when attempted after eight years of age.
For severe amblyopia, it is generally accepted that occlusion with patching is the standard of care. Other modalities of treatment, such as atropine penalization and optical penalization, are widely considered insufficient as initial treatments for severe amblyopia. However, controversy exists with regard to how many hours per day of patching should be prescribed. Advocates of full-time patching purport that such a regimen is needed to restore visual acuity more rapidly and more effectively. Advocates of part-time patching believe it to be better tolerated by the child and family, therefore producing less stress on the parent-child relationship and producing better results through better compliance. Part-time patching may also promote the development of binocularity in patients who have "straight-eyes", reduce the chance of a straight-eyed patient developing manifest strabismus or losing stereopsis, and reduce the incidence of reverse- or occlusion-amblyopia.
The study is a randomized trial comparing daily patching regimes for children with severe amblyopia. It will consist of about 160 children. Patients in the severe (20/100 to 20/400) group will patch part-time (6 hours) or full-time (all or all but one waking hour) of each day for the 4 month study period. There are at least two follow up visits during the 4-month period. Visual acuity is the major study outcome. It is assessed at the 4-month exam.
Study Type
Enrollment (Actual)
Phase
- Phase 3
Contacts and Locations
Study Locations
-
-
Maryland
-
Baltimore, Maryland, United States, 21287-9028
- Wilmer Eye Institute
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Patients must be less than 7 years of age with the original cause of amblyopia as strabismus or anisometropia (a refractive error difference of more than one diopter between the two eyes.)
- Visual acuity in the amblyopic eye must be between 20/100 and 20/400.
- Visual acuity in the sound eye of 20/40 or better.
- There must be at least 3 lines of acuity difference between the two eyes.
Exclusion Criteria:
- Patching treatment (other than spectacles) within six months prior to enrollment and other amblyopia treatment of any type used within one month prior to enrollment.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: SINGLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
ACTIVE_COMPARATOR: 6hrs daily patching
6 hours per day of patching in the sound eye
|
adhesive eye patch used to cover the sound eye
Other Names:
|
ACTIVE_COMPARATOR: Full-time daily patching
Patching of the sound eye all but one waking hour
|
adhesive eye patch used to cover the sound eye
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Visual acuity improvement at 17wks.
Time Frame: 17 weeks
|
17 weeks
|
Collaborators and Investigators
Sponsor
Collaborators
Publications and helpful links
General Publications
- Holmes JM, Kraker RT, Beck RW, Birch EE, Cotter SA, Everett DF, Hertle RW, Quinn GE, Repka MX, Scheiman MM, Wallace DK; Pediatric Eye Disease Investigator Group. A randomized trial of prescribed patching regimens for treatment of severe amblyopia in children. Ophthalmology. 2003 Nov;110(11):2075-87. doi: 10.1016/j.ophtha.2003.08.001.
- Repka M, Simons K, Kraker R; Pediatric Eye Disease Investigator Group. Laterality of amblyopia. Am J Ophthalmol. 2010 Aug;150(2):270-4. doi: 10.1016/j.ajo.2010.01.040. Epub 2010 May 8.
Study record dates
Study Major Dates
Study Start
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ESTIMATE)
Study Record Updates
Last Update Posted (ESTIMATE)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- NEI-88
- 2U10EY011751 (U.S. NIH Grant/Contract)
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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