Can a liver drug restore color vision? small trial hopes to find out

NCT ID NCT04041232

First seen Sep 30, 2025 · Last updated May 19, 2026 · Updated 36 times

Summary

This early study tests whether an FDA-approved drug called glycerol phenylbutyrate (PBA) can improve vision in people with a rare inherited form of color blindness caused by changes in the ATF6 gene. Only 2 adults with this condition will take the drug three times daily and undergo several eye tests over at least 3 clinic visits. The goal is to see if PBA can reduce stress in the retina and improve color vision and other visual functions.

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Contacts and locations

Locations

  • Columbia University Irving Medical Center

    New York, New York, 10032, United States

Conditions

Explore the condition pages connected to this study.