Refractive Accuracy of "2WIN" and Portable Autorefractors
Study Details
Study Description
Brief Summary
Youth and some adults have photoscreening refractions and hand-held auto refraction before cycloplegia refraction during new and follow up eye examinations. Vector math is applied to each refraction to determine how closely the hand-held "dry" devices match actual refraction.
Condition or Disease | Intervention/Treatment | Phase |
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Detailed Description
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 Design
Outcome Measures
Primary Outcome Measures
- Refractive Accuracy [1 day]
spherical equivalent
- Refractive Accuracy [1 day]
Vector transform J0 and J45 astigmatism
- Refractive Accuracy [1 day]
Spectacle comparison score (Percent similarity combined sphere-cylinder)
Secondary Outcome Measures
- Impact of age [1 day]
Spectacle similarity score striated by age relative to patient's ability to accommodate
Eligibility Criteria
Criteria
Inclusion Criteria:
- Patient undergoing new or follow examination at pediatric eye and adult strabismus clinic Willing to undergo screening refractive device developmental delays included
Exclusion Criteria:
- Intraocular lens in place
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Alaska Children's EYE & Strabismus | Anchorage | Alaska | United States | 99508 |
Sponsors and Collaborators
- Alaska Blind Child Discovery
Investigators
- Principal Investigator: Bob Arnold, MD, Coordinator Alaska Blind Child Discovery
Study Documents (Full-Text)
None provided.More Information
Publications
- ABCD RefAcc