Refractive Accuracy of "2WIN" and Portable Autorefractors
- Conditions
- Refractive Error - Myopia AxialAccomodationVisual ImpairmentHyperopia of Both EyesAstigmatism
- Registration Number
- NCT04249505
- Lead Sponsor
- Alaska Blind Child Discovery
- 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.
- 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.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 708
- Patient undergoing new or follow examination at pediatric eye and adult strabismus clinic Willing to undergo screening refractive device developmental delays included
- Intraocular lens in place
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Refractive Accuracy 1 day Spectacle comparison score (Percent similarity combined sphere-cylinder)
- Secondary Outcome Measures
Name Time Method Impact of age 1 day Spectacle similarity score striated by age relative to patient's ability to accommodate
Trial Locations
- Locations (1)
Alaska Children's EYE & Strabismus
🇺🇸Anchorage, Alaska, United States