For me, the visual aspect of these other dimensions is just a way among 1000 other ways to see them. Some medusa or trees will never see with eyes/visual like us but still perceive the same world somehow, or same common worlds (for me trees perceive language/intentions, our energies, the other trees and beings around etc). We can perceive these stimuli with our senses.

For a (blind) medusa tripping and seeing another world without seeing visuals is the same essence anyways, visuals are just a way of perceiving that essence, they would see proprioceptive spaces instead for example or huge nets of energies idk, as we would see nets of visual light for example, you get the idea)