SUBJECTIVE REFRACTION WITH LIGHTFIELD TECHNOLOGY
PROOF OF CONCEPT OF A NEW DEVICE FOR SUBJECTIVE REFRACTION WITH LIGHTFIELD TECHNOLOGY
1 other identifier
observational
120
1 country
2
Brief Summary
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).
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for all trials
Started Feb 2025
Shorter than P25 for all trials
2 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
September 2, 2024
CompletedFirst Posted
Study publicly available on registry
September 4, 2024
CompletedStudy Start
First participant enrolled
February 15, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
May 30, 2025
CompletedStudy Completion
Last participant's last visit for all outcomes
August 30, 2025
CompletedSeptember 5, 2025
September 1, 2025
3 months
September 2, 2024
September 4, 2025
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
precision of determination of refractive error
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 Outcomes (1)
repeatability of all three methods for subjective refraction
within one week
Study Arms (1)
healthy adults with refractive error
Eligibility Criteria
healthy adults with refractive error
You may qualify if:
- 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
You may not qualify if:
- 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
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Daniela Noschlead
Study Sites (2)
Institute of Optometry, FHNW
Olten, Canton of Solothurn, 4600, Switzerland
Insititute of Optometry, FHNW University of Applied Sciences and Arts Northwestern Switzerland
Olten, 4600, Switzerland
Related Publications (1)
Venkataraman AP, Sirak D, Brautaset R, Dominguez-Vicent A. Evaluation of the Performance of Algorithm-Based Methods for Subjective Refraction. J Clin Med. 2020 Sep 29;9(10):3144. doi: 10.3390/jcm9103144.
PMID: 33003297BACKGROUND
Related Links
Study Design
- Study Type
- observational
- Observational Model
- CASE CONTROL
- Time Perspective
- CROSS SECTIONAL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR INVESTIGATOR
- PI Title
- Lecturer
Study Record Dates
First Submitted
September 2, 2024
First Posted
September 4, 2024
Study Start
February 15, 2025
Primary Completion
May 30, 2025
Study Completion
August 30, 2025
Last Updated
September 5, 2025
Record last verified: 2025-09
Data Sharing
- IPD Sharing
- Will not share