Clinical Trials Logo
  1. Home
  2. Astigmatism
  3. NCT04249505

Refractive Accuracy of "2WIN" and Portable Autorefractors

Astigmatism Clinical Trial

Official title:
The Refractive Accuracy of Photoscreeners "2WIN" and "PlusoptiX" and the "Retinomax" Auto Refractor

Clinical Trial 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.

Clinical Trial 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

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT04249505
Study type Observational
Source Alaska Blind Child Discovery
Contact
Status Completed
Phase
Start date January 9, 2020
Completion date April 1, 2021
View Details
See also
  Status Clinical Trial Phase
Active, not recruiting NCT04778501 - PMCF Study on Monofocal Toric IOL (PODEYE TORIC) in Asia N/A
Completed NCT04536571 - Vision Stability and Preference for Soft Toric vs. Soft Spherical Contact Lenses N/A
Completed NCT04613882 - Quantification of the Visual Benefits of Soft Toric Contact Lenses Compared to Soft Spherical Contact Lenses N/A
Completed NCT05039112 - Clinical Comparison of 2 Daily Disposable Toric Soft Contact Lenses N/A
Recruiting NCT05611294 - Contralateral Study of Topography Guided LASIK Versus Small Incision Lenticule Extraction N/A
Completed NCT05633082 - A Clinical Performance of Two Soft Toric Contact Lenses N/A
Not yet recruiting NCT05506553 - Comparison of Aspheric Toric Intraocular Lenses for Micro-monovision N/A
Not yet recruiting NCT05561296 - Astigmatism Management With Iris-registration Guided Corneal Relaxing Incisions or Toric IOLs During Cataract Surgery N/A
Completed NCT02847169 - Clinical Performance of Toric Hydrogel Contact Lenses Following One Week of Daily Wear N/A
Recruiting NCT02618018 - Clinical Evaluation of Efficacy and Stability of AT TORBI 709M 4-haptic Toric IOL in Cataract Surgery N/A
Completed NCT02551796 - Early Changes Among FLEx, LASIK and FS-LASIK N/A
Completed NCT02550353 - Changes Between Lenticule Extraction and Femtosecond Laser-assisted Laser in Situ Keratomileusis N/A
Completed NCT02555098 - A Bilateral Dispensing Clinical Trial of an Sapphire Lens Against Senofilcon A Toric for Astigmatism Lens N/A
Completed NCT02423109 - Bilateral Dispensing Study of Fanfilcon A Toric Versus Enfilcon A Toric Lenses N/A
Completed NCT02248766 - Clinical Performance of Habitual Wearers of Avaira Toric When Refitted With Clariti Toric Lenses N/A
Completed NCT01857102 - Toric Eye Strain and Stability Study N/A
Completed NCT01965288 - Clinical Performance of Biofinity Toric Versus Air Optix for Astigmatism N/A
Completed NCT02624791 - Evaluating and Improving Functional Driving Vision of Patients With Astigmatism N/A
Withdrawn NCT01680354 - Surgical Correction of Astigmatism N/A
Completed NCT01207466 - Evaluation of Two Daily Disposable Contact Lenses for Wearers With Astigmatism N/A