He looks at my eyes every March and has never commented on the iris freckles. I have had them for a very long time and they do not appear to be bothering anything. That image is from May 2020 and they look the same now.This is just from quick searches. They seem to be called 'eye freckles'. Some of the causes range from sun exposure to toxins. (Remember this is the internet). I would get an an ophthalmologist to look at it.