Visualizing for me has always been like touching something with my eyes closed. I can't "see" the object, but I have a feeling for all the shapes and contours. You can feel which way a key is in your hand and where each ridge is without having to see it. I solve geometry problems the same way. I can't see the whole thing at once, but I can move my sense of feeling across arbitrary scenes.

>How do you solve geometry problems. For lots of them I visualize / rotate things im my head.

Not the other guy, but I can think about how they look without actually 'seeing' them in my mind.

Funny you should ask. In high school I was regarded as highly intelligent, I was near the top of all of my classes and widely read, with an excellent memory for facts and figures. (Though no visual memory whatsoever).

Then one day we did a IQ test in science class. I scored near the bottom of the class. All of the geometry based "what comes next" puzzles left me flummoxed. Because I couldn't visualise, I couldn't rotate images in my head to identify patterns and so many of the questions were like that.

I was good at mechanical drawing in college, meaning I could visualize the view of something from different sides. But, generally there was a perspective to work off of.

I don’t have aphantasia, but I believe I have reduced ability to visualize things with accuracy and in detail. My visualizations are very imperfect and more like glimpses than strong visualizations. In particular, I struggle to visualize faces.