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Feasibility Tests for Various Prism Configurations for Visual Field Loss

StatusCompleted
PhaseNot applicable
Started
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Record History

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  1. Trial completed Show 6 more changesShow less
    • Final enrollment: 10 participants (planned 20)
    • Primary completion date changed from estimate of Aug 2026 to Jun 30, 2026
    • Study completion date changed from estimate of Dec 2026 to Sep 30, 2026
    • Eligibility criteria expanded, about 9 words
    • Site details revised
    • Publications: details revised at 1 of 1 entry
  2. Primary completion date: Aug 2025 to Aug 2026
    • Study completion date: Aug 2025 to Dec 2026
    v9
  3. Re-verified, no change to tracked fieldsv8
  4. Primary and study completion dates: Aug 2024 to Aug 2025v7
  5. 3 versions Re-verified since Nov 24, 2021, no change to tracked fieldsv4-v6
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  1. Trial status: Not Yet Recruiting to Recruiting
    • Study sites: 0 to 1
    • Start date changed from estimate of Oct 2020 to Nov 6, 2020
    v3
  2. Start date: Jul 2020 to Oct 2020v2
  1. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
The investigators will develop and test different configurations of high-power prisms to expand the field of vision of patients with visual field loss to assist them with obstacle detection when walking. The study will involve multiple visits (typically four) to Schepens Eye Research Institute for fitting and testing with the prism glasses. The overall objective is to determine best designs and fitting parameters for implementation in prism devices for future clinical trials.
Trial Details
NCT Number NCT04424979
Lead Sponsor Massachusetts Eye and Ear Infirmary
Collaborators: National Eye Institute (NEI)
Conditions
(from sponsor)		 Hemianopia, Homonymous, Tunnel Vision, Visual Field Defect, Peripheral, Visual Field Constriction Bilateral, Visual Field Defect Homonymous Bilateral
Related terms Hemianopsia
Enrollment 10 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov