Refractive Accuracy of "2WIN" and Portable Autorefractors
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|ClinicalTrials.gov Identifier: NCT04249505|
Recruitment Status : Completed
First Posted : January 31, 2020
Last Update Posted : July 23, 2021
|Condition or disease||Intervention/treatment|
|Refractive Error - Myopia Axial Astigmatism Accomodation Visual Impairment Hyperopia of Both Eyes||Device: "2WIN" Photoscreener Device: "Plusoptix A12" Device: "Retinomax"|
A closeness-of-fit algorithm utilizing vector transformations of astigmatism is designed and applied to 50-years of clinical international refractive experience.
As a part of new and follow up comprehensive eye examinations, patients and parents consented to confirm the cycloplegic refraction to other portable refractive tools.
The ability of photoscreeners "2WIN" ("Adaptica," Padova italy), "PlusoptiX A12" (Nuremberg, Germany) and "Retinomax" (Righton, Tokyo, Japan) to match actual refraction is assessed utilizing the new algorithm.
This algorithm could then be applied to batches of donated spectacles distend by charitable organizations worldwide if portable auto refracting devices are employed.
|Study Type :||Observational|
|Actual Enrollment :||708 participants|
|Official Title:||The Refractive Accuracy of Photoscreeners "2WIN" and "PlusoptiX" and the "Retinomax" Auto Refractor|
|Actual Study Start Date :||January 9, 2020|
|Actual Primary Completion Date :||April 1, 2021|
|Actual Study Completion Date :||April 1, 2021|
- Device: "2WIN" Photoscreener
non-cycloplegia refraction by Adaptica "2WIN"
- Device: "Plusoptix A12"
non-cycloplegic refraction by "Plusoptix A12" photoscreener
- Device: "Retinomax"
non-cycloplegic refraction by "Retinomax K+" auto refractor
- Refractive Accuracy [ Time Frame: 1 day ]spherical equivalent
- Refractive Accuracy [ Time Frame: 1 day ]Vector transform J0 and J45 astigmatism
- Refractive Accuracy [ Time Frame: 1 day ]Spectacle comparison score (Percent similarity combined sphere-cylinder)
- Impact of age [ Time Frame: 1 day ]Spectacle similarity score striated by age relative to patient's ability to accommodate
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04249505
|United States, Alaska|
|Alaska Children's EYE & Strabismus|
|Anchorage, Alaska, United States, 99508|
|Principal Investigator:||Bob Arnold, MD||Coordinator Alaska Blind Child Discovery|