(yes, I always assumed, that when using astral perception I always use Assensing for perception, not only when I analyse an aura. I've just checked the Assensing skill description (page 142) and the paragraph about Astral Perception (page 312) and I see that may have been wrong. Interesting, that JackVII has just found this quote, that explicitly uses Assensing for percepting hidden things.
Assensing is probably only for auras, nor for "seeing" in general in astral space (except by RAW also for percepting hidden things). So all spirits having Perception would be ok, even if they couldn't see the physical world like humans do).
But the question is still there, why do some spirits have Enhanced Senses they don't have the basic sense for and in addition
What is meant by the sentence right before the quote JackVII wrote before:
page 301, SR5
The spirit is dual-natured while it’s materialized, which means it exists simultaneously on the physical and astral plane, meaning it can see objects in both places
The emphasised part makes no sense, if the spirit can only use astral perception. The only instance how there could be a difference in astral perception between being physical and being astral would be, if there was a mana barrier between me and the objects that was cast in astral space. Then I couldn't see the physical objects behind the barrier from my astral point of view, but I could see them from my physical point of view. But this is such an improbable case, that I don't think that this sentence was formulated for this one thing.
Normally I would assume, that this sentence does express, that a spirit can simultaneously astral percept and see physically like a human does.
But that is expressively contradicted in the next sentence.
So
Question: can a materialized spirit see like a normal human can?