Objective Visual Acuity Measurement Using Suppression of the Optokinetic Nystagmus (OKN). (Speedwheel)

May 6, 2021 updated by: Anja Palmowski-Wolfe, University of Basel

Clinical Application of Objective Visual Acuity Measurement Using Suppression Method to Inhibit Optokinetic Nystagmus (OKN).

Suppression of the optokinetic nystagmus when a target is perceived can be applied to assess visual acuity objectively. Our aim is to establish prediction intervals for this optokinetic nystagmus suppression test (Speedwheel Test, SW) so that SW acuity may be used to estimate Snellen acuity (FrACT- C and -E) in the clinic in adults and children unable to cooperate in other acuity testing.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

In this prospective single center study subjects aged at least 4 years underwent testing of visual acuity with SW, Landolt-C and Tumbling-E symbols (Freiburg acuity test: FrACT-C, FrACT-E). Prediction intervals are to be established for SW compared to FrACT-C or -E and for FrACT- E compared to FrACT-C.

Study Type

Observational

Enrollment (Actual)

246

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Switzerland
      • Basel, Switzerland, 4031
        • University Basel, University Eye Hospital Basel

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

4 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

healthy volunteers aged 4 and above

Description

Inclusion Criteria:

  • able and willing to perform the test

Exclusion Criteria:

  • under 4 years of age
  • unable or unwilling

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Human subjects aged 4 and above
Human volunteers aged 4 and above.
Diagnostic test: Visual acuity testing with SW , Landolt-"C" and Tumbling-"E" symbols
Establish prediction intervals for acuity tests

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Prediction intervals of Snellen acuity for the SW
Time Frame: 12 months
Prediction intervals of Snellen acuity for the SW compared to Landolt C and E symbols
12 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Prediction intervals of Snellen acuity for Landolt C compared to E symbols
Time Frame: 12 months
Prediction intervals of Snellen acuity for Landolt C compared to E symbols
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Basel

Investigators

  • Principal Investigator: Anja M Palmowski-Wolfe, Prof, University Basel, University Eye Hospital Basel

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

October 1, 2019

Primary Completion (Actual)

July 30, 2020

Study Completion (Actual)

September 30, 2020

Study Registration Dates

First Submitted

November 17, 2020

First Submitted That Met QC Criteria

November 18, 2020

First Posted (Actual)

November 24, 2020

Study Record Updates

Last Update Posted (Actual)

May 10, 2021

Last Update Submitted That Met QC Criteria

May 6, 2021

Last Verified

May 1, 2021

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2016-02078

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

The results are to be shared in a publication

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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