I think it’s ok to select jurors based some basic abilities. I don’t know if this considered discrimination based on IQ in the US. But if a grown person has the mind of a 5year old or doesn’t know how to walk up stairs I think it’s fair to say “you shouldn’t be in a jury”. Likewise if a person doesn’t understand the concept of zooming an image or slow motion, then I think it’s quite fair to exclude them from jury duty.