You could write a description of the image and put it in the alt text like this

![](https://lemmy.ca/pictrs/image/7c2ed146-ee52-4f0b-89b0-ce403f9e9f35.jpeg "Lesson: Double Negatives. I'm anti-antifa. I am anti-anti-fascist. I am fascist")

here, i think i got that right
hovering over the image should give you the "Lesson: Double Negatives. I'm anti-antifa. I am anti-anti-fascist. I am fascist" text

Of course you can. Explain what you see like you would to a blind person.