SUBJECTIVE REFRACTION WITH LIGHTFIELD TECHNOLOGY

Recruiting

• Conditions: Refractive Error Correction

• Registration Number: NCT06583954
• Lead Sponsor: Daniela Nosch

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).

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2024-09-02
• Study First Submitted QC: 2024-09-02
• Study First Posted: 2024-09-04
• Study Start: 2025-02-15
• Status Verified: 2025-03
• Last Update Submitted: 2025-03-10
• Last Update Posted: 2025-03-12
• Primary Completion: 2025-06-30
• Study Completion: 2025-06-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 120

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 & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
precision of determination of refractive error	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).

Secondary Outcome Measures

Name	Time	Method
repeatability of all three methods for subjective refraction	within one week

Trial Locations

Locations (2)

Institute of Optometry, FHNW; 🇨🇭 Olten, Solothurn, Switzerland

Insititute of Optometry, FHNW University of Applied Sciences and Arts Northwestern Switzerland; 🇨🇭 Olten, Switzerland