Refractive Accuracy of "2WIN" and Portable Autorefractors

Alaska Blind Child Discovery

Status: Completed

Conditions: Refractive Error - Myopia Axial; Accomodation; Astigmatism; Visual Impairment; Hyperopia of Both Eyes

Treatments: Device: "Retinomax"; Device: "Plusoptix A12"; Device: "2WIN" Photoscreener

Study type: Observational

Funder types: Other

Identifiers

NCT04249505

ABCD RefAcc

Details and patient eligibility

About

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.

Full 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.

Enrollment: 708 patients

Sex: All

Ages: 6 months to 95 years old

Volunteers: Accepts Healthy Volunteers

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