OCT imaging may be recommended if you have blurred vision and the cause is unclear, because it can reveal swelling

https://optometryguide906.scriblorax.com/posts/when-should-you-ask-about-an-oct-eye-scan-in-fontana

OCT imaging may be recommended if you have blurred vision and the cause is unclear, because it can reveal swelling, thinning, or fluid in the layers of the eye.