Here's what I think. A tree falling would still make sound if there is an atmosphere, which I assume so, if I also assume the tree was a living tree, up until the time it falls. That we may have functioning ears & if we are near enough, permits us to receive the disturbance in the atmosphere when the tree falls, crashing into the ground. No functioning ears, no sound would be received, but, close enough to the source, & the vibration through the air,& ground may be felt in the body.
If no one had functioning eyes, visual comparison & judgements would be irrelevant. Other judgements about one's other features may be compared, & some ideals about what beauty is, I think, would still be constructed, so , if living with even one other person a definition or argument about which of you is more beautiful would arise.
I love these thought experiments Sometimes they make my brain feel swimmy.😸
I have spent long periods of time where no one has touched me, even through clothing, & sometimes it feels distinctly weird. I sort of do a double take, as my brain assesses what the person just did. I am not comfortable with people casually touching me, or, even more uncomfortable when they presume any prolonged touch like hugs, for example.
Since losing most of my eyesight, I've had to permit more touching. But, I do not want people presuming they are permitted to reach out & grab my arm, hand, shoulder, whatever, just because they think they are trying to help. If I protest, I have offended them.
I still tend to 'block' in my mind, & try to imagine my body is wooden &/or the thing touching me is not flesh.
That's only for humans. I don't want human touch to be so real.
Cats, dogs, or any other living, breathing creature, & I'm fine. Indeed, I really enjoy the tactile experience when greeting dogs, & when I had Mekitty.
An odd thing happens sometimes, when I am 'taking my time', shall I say, getting to sleep, & I might feel , from within, often incorporating how my head is angled, if I have a blanket over part of my head or not, & alongside, my mind conjures up an image, which does not look like me, & I feel as if I do look like the image. It is a very odd feeling, to realise when I am doing this, that the sensory information from my hand & what I perceive in mind are different.
So, I do wonder, because even my conjured image relies upon previously acquired visual data to create, what image would be available to us if we never had functioning eyes.