SUBJECTIVE REFRACTION WITH LIGHTFIELD TECHNOLOGY

September 4, 2025 updated by: Daniela Nosch

PROOF OF CONCEPT OF A NEW DEVICE FOR SUBJECTIVE REFRACTION WITH LIGHTFIELD TECHNOLOGY

The aim of this study is to test whether it is possible in principle to determine defective vision using light field technology. The measurements with this first prototype will be compared with the results of the conventional method for subjective refraction determination and those using a phoropter (Vision R-800 phoropter).

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

120

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
      • Olten, Switzerland, 4600
        • Insititute of Optometry, FHNW University of Applied Sciences and Arts Northwestern Switzerland
    • Canton of Solothurn
      • Olten, Canton of Solothurn, Switzerland, 4600
        • Institute of Optometry, FHNW

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

healthy adults with refractive error

Description

Inclusion Criteria:

  • Minimum age of 18 years
  • Best corrected visual acuity ≥ 0.8 (logMAR ≤ 0.1).
  • Dioptric range for hypermetropia: ≤ +4.50 D.
  • Dioptric range for myopia: ≥ -6.50 D.
  • Dioptric range for cylinder: ≤ -2.00 D.
  • Good general health, i.e.no systemic disease such as diabetes or rheumatism which could influence ocular health
  • No ocular pathology or history of (intra)ocular surgery except for cataract surgery

Exclusion Criteria:

  • • Contact lens wear during the days of visit

    • Binocular vision problems (e.g. amblyopia, strabismus).
    • Inability to follow the procedures of the investigation, such as language problems, psychological disorders and dementia

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
healthy adults with refractive error

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
precision of determination of refractive error
Time Frame: within one week
To explore if this prototype CREAL device based on LightField Technology can determine the refractive error reliably, in comparison to well-established methods such as subjective refraction with a trial frame and with the phoropter Vision-R 800 (Essilor SA).
within one week

Secondary Outcome Measures

Outcome Measure
Time Frame
repeatability of all three methods for subjective refraction
Time Frame: within one week
within one week

Collaborators and Investigators

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

Sponsor

Daniela Nosch

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

Helpful Links

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)

February 15, 2025

Primary Completion (Actual)

May 30, 2025

Study Completion (Actual)

August 30, 2025

Study Registration Dates

First Submitted

September 2, 2024

First Submitted That Met QC Criteria

September 2, 2024

First Posted (Actual)

September 4, 2024

Study Record Updates

Last Update Posted (Estimated)

September 5, 2025

Last Update Submitted That Met QC Criteria

September 4, 2025

Last Verified

September 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2024-D0081 (Registry Identifier: Swissethics)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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