Are there treatments for acquired heterochromia?

Depends on the cause: But more often than not, not reversibleHere is an informative article https://www.aao.org/eye-health/diseases/what-is-heterochromia Acquired form is rather rare unless there is a specific injury or disease process such as glaucoma possibly from using bimatoprost in only one eye for glaucoma. In the latter instance it is not reversible. https://www.aao.org/eye-health/tips-prevention/latisse