Plain-English translation of NCT05650905 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
Researchers want to understand whether COVID-19 causes lasting changes to how blood vessels in your eye work, even after you've recovered from the infection. They will use special imaging equipment to measure how your eye's blood vessels respond to flickering light and to look at the structures in your eye. This study compares three groups: people who had COVID-19, people with long COVID symptoms, and people who have never had COVID-19.
COVID-19 affects not just the lungs but also the brain and blood vessels throughout the body. Some patients continue to experience symptoms long after infection, and researchers don't yet know if COVID-19 leaves permanent damage to blood vessel function. Because the eye's blood vessels can be studied non-invasively and are similar to brain blood vessels, examining them may help doctors understand how COVID-19 affects the nervous system long-term.
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You will visit the research center at the Medical University of Vienna for eye imaging tests. Researchers will use special cameras and lights to measure how your eye's blood vessels respond to flickering light, check oxygen levels in your retina, measure blood vessel width and density, and take detailed images of your retina and optic nerve. The visits are non-invasive, meaning nothing is inserted into your eye, and the procedures are similar to a routine eye exam.
AI-generated summary from trial data · Jun 6, 2026 · Not medical advice
Austria
Sponsor
Medical University of Vienna
Enrollment target
~90 participants
Started
July 2021
Primary completion
December 2025
This trial's estimated completion date has passed — the record may not be fully up to date.
Age range
18 Years and older
Last updated on clinicaltrials.gov in May 2025.
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